diff --git a/crates/header-translator/src/method.rs b/crates/header-translator/src/method.rs
index 29ec44239..7a8ee56a6 100644
--- a/crates/header-translator/src/method.rs
+++ b/crates/header-translator/src/method.rs
@@ -195,7 +195,7 @@ impl Method {
                 });
 
                 let ty = entity.get_type().expect("argument type");
-                let ty = RustType::parse(ty, false, is_consumed);
+                let ty = RustType::parse_argument(ty, is_consumed);
 
                 (name, qualifier, ty)
             })
@@ -210,7 +210,7 @@ impl Method {
             );
         }
         let result_type = if result_type.get_kind() != TypeKind::Void {
-            Some(RustType::parse(result_type, true, false))
+            Some(RustType::parse_return(result_type))
         } else {
             None
         };
diff --git a/crates/header-translator/src/rust_type.rs b/crates/header-translator/src/rust_type.rs
index 9dc7235ae..1149bb3db 100644
--- a/crates/header-translator/src/rust_type.rs
+++ b/crates/header-translator/src/rust_type.rs
@@ -301,7 +301,7 @@ impl RustType {
         matches!(self, Self::Id { .. })
     }
 
-    pub fn parse(ty: Type<'_>, is_return: bool, is_consumed: bool) -> Self {
+    fn parse(ty: Type<'_>, is_return: bool, is_consumed: bool) -> Self {
         use TypeKind::*;
 
         // println!("{:?}, {:?}", ty, ty.get_class_type());
@@ -450,6 +450,60 @@ impl RustType {
     }
 }
 
+impl RustType {
+    fn visit_lifetime(&self, mut f: impl FnMut(Lifetime)) {
+        match self {
+            Self::Id { lifetime, .. } => f(*lifetime),
+            Self::Pointer { pointee, .. } => pointee.visit_lifetime(f),
+            Self::Array { element_type, .. } => element_type.visit_lifetime(f),
+            _ => {}
+        }
+    }
+
+    pub fn parse_return(ty: Type<'_>) -> Self {
+        let this = Self::parse(ty, true, false);
+
+        this.visit_lifetime(|lifetime| {
+            if lifetime != Lifetime::Unspecified {
+                panic!("unexpected lifetime in return {this:?}");
+            }
+        });
+
+        this
+    }
+
+    pub fn parse_argument(ty: Type<'_>, is_consumed: bool) -> Self {
+        let this = Self::parse(ty, false, is_consumed);
+
+        match &this {
+            Self::Pointer { pointee, .. } => pointee.visit_lifetime(|lifetime| {
+                if lifetime != Lifetime::Autoreleasing && lifetime != Lifetime::Unspecified {
+                    panic!("unexpected lifetime {lifetime:?} in pointer argument {ty:?}");
+                }
+            }),
+            _ => this.visit_lifetime(|lifetime| {
+                if lifetime != Lifetime::Strong && lifetime != Lifetime::Unspecified {
+                    panic!("unexpected lifetime {lifetime:?} in argument {ty:?}");
+                }
+            }),
+        }
+
+        this
+    }
+
+    pub fn parse_typedef(ty: Type<'_>) -> Self {
+        let this = Self::parse(ty, false, false);
+
+        this.visit_lifetime(|lifetime| {
+            if lifetime != Lifetime::Unspecified {
+                panic!("unexpected lifetime in typedef {this:?}");
+            }
+        });
+
+        this
+    }
+}
+
 impl ToTokens for RustType {
     fn to_tokens(&self, tokens: &mut TokenStream) {
         use RustType::*;
diff --git a/crates/header-translator/src/stmt.rs b/crates/header-translator/src/stmt.rs
index 038648621..b2fbac0aa 100644
--- a/crates/header-translator/src/stmt.rs
+++ b/crates/header-translator/src/stmt.rs
@@ -299,7 +299,7 @@ impl Stmt {
                         })
                     }
                     TypeKind::Typedef => {
-                        let type_ = RustType::parse(ty, false, false);
+                        let type_ = RustType::parse_typedef(ty);
                         Some(Self::AliasDecl { name, type_ })
                     }
                     _ => {
diff --git a/crates/icrate/src/Foundation.toml b/crates/icrate/src/Foundation.toml
index 418379d44..9b7162c2d 100644
--- a/crates/icrate/src/Foundation.toml
+++ b/crates/icrate/src/Foundation.toml
@@ -26,3 +26,16 @@ initWithString = { unsafe = false }
 [class.NSBlockOperation.methods]
 # Uses `NSArray<void (^)(void)>`, which is difficult to handle
 executionBlocks = { skipped = true }
+
+# These use `Class<NSItemProvider...>`, which is unsupported
+[class.NSItemProvider.methods]
+registerObjectOfClass_visibility_loadHandler = { skipped = true }
+canLoadObjectOfClass = { skipped = true }
+loadObjectOfClass_completionHandler = { skipped = true }
+
+# These use `SomeObject * __strong *`, which is unsupported
+[class.NSNetService.methods]
+getInputStream_outputStream = { skipped = true }
+[class.NSPropertyListSerialization.methods]
+dataFromPropertyList_format_errorDescription = { skipped = true }
+propertyListFromData_mutabilityOption_format_errorDescription = { skipped = true }
diff --git a/crates/icrate/src/generated/Foundation/NSItemProvider.rs b/crates/icrate/src/generated/Foundation/NSItemProvider.rs
index b3e806e09..ac08b003f 100644
--- a/crates/icrate/src/generated/Foundation/NSItemProvider.rs
+++ b/crates/icrate/src/generated/Foundation/NSItemProvider.rs
@@ -108,33 +108,6 @@ impl NSItemProvider {
     ) {
         msg_send![self, registerObject: object, visibility: visibility]
     }
-    pub unsafe fn registerObjectOfClass_visibility_loadHandler(
-        &self,
-        aClass: &TodoProtocols,
-        visibility: NSItemProviderRepresentationVisibility,
-        loadHandler: TodoBlock,
-    ) {
-        msg_send![
-            self,
-            registerObjectOfClass: aClass,
-            visibility: visibility,
-            loadHandler: loadHandler
-        ]
-    }
-    pub unsafe fn canLoadObjectOfClass(&self, aClass: &TodoProtocols) -> bool {
-        msg_send![self, canLoadObjectOfClass: aClass]
-    }
-    pub unsafe fn loadObjectOfClass_completionHandler(
-        &self,
-        aClass: &TodoProtocols,
-        completionHandler: TodoBlock,
-    ) -> Id<NSProgress, Shared> {
-        msg_send_id![
-            self,
-            loadObjectOfClass: aClass,
-            completionHandler: completionHandler
-        ]
-    }
     pub unsafe fn initWithItem_typeIdentifier(
         &self,
         item: Option<&NSSecureCoding>,
diff --git a/crates/icrate/src/generated/Foundation/NSNetServices.rs b/crates/icrate/src/generated/Foundation/NSNetServices.rs
index 67b19933c..f958b2990 100644
--- a/crates/icrate/src/generated/Foundation/NSNetServices.rs
+++ b/crates/icrate/src/generated/Foundation/NSNetServices.rs
@@ -70,17 +70,6 @@ impl NSNetService {
     pub unsafe fn resolveWithTimeout(&self, timeout: NSTimeInterval) {
         msg_send![self, resolveWithTimeout: timeout]
     }
-    pub unsafe fn getInputStream_outputStream(
-        &self,
-        inputStream: *mut *mut NSInputStream,
-        outputStream: *mut *mut NSOutputStream,
-    ) -> bool {
-        msg_send![
-            self,
-            getInputStream: inputStream,
-            outputStream: outputStream
-        ]
-    }
     pub unsafe fn setTXTRecordData(&self, recordData: Option<&NSData>) -> bool {
         msg_send![self, setTXTRecordData: recordData]
     }
diff --git a/crates/icrate/src/generated/Foundation/NSPropertyList.rs b/crates/icrate/src/generated/Foundation/NSPropertyList.rs
index 49b47c75f..9afbb9d78 100644
--- a/crates/icrate/src/generated/Foundation/NSPropertyList.rs
+++ b/crates/icrate/src/generated/Foundation/NSPropertyList.rs
@@ -83,30 +83,4 @@ impl NSPropertyListSerialization {
             error: error
         ]
     }
-    pub unsafe fn dataFromPropertyList_format_errorDescription(
-        plist: &Object,
-        format: NSPropertyListFormat,
-        errorString: *mut *mut NSString,
-    ) -> Option<Id<NSData, Shared>> {
-        msg_send_id![
-            Self::class(),
-            dataFromPropertyList: plist,
-            format: format,
-            errorDescription: errorString
-        ]
-    }
-    pub unsafe fn propertyListFromData_mutabilityOption_format_errorDescription(
-        data: &NSData,
-        opt: NSPropertyListMutabilityOptions,
-        format: *mut NSPropertyListFormat,
-        errorString: *mut *mut NSString,
-    ) -> Option<Id<Object, Shared>> {
-        msg_send_id![
-            Self::class(),
-            propertyListFromData: data,
-            mutabilityOption: opt,
-            format: format,
-            errorDescription: errorString
-        ]
-    }
 }