diff --git a/packages/concerto-core/api.txt b/packages/concerto-core/api.txt
index 4465835d5b..d73f0f71ba 100644
--- a/packages/concerto-core/api.txt
+++ b/packages/concerto-core/api.txt
@@ -209,6 +209,7 @@ class ModelManager {
    + void clearModelFiles() 
    + ModelFile getModelFile(string) 
    + string[] getNamespaces() 
+   + ClassDeclaration getType(string) throws TypeNotFoundException
    + AssetDeclaration[] getAssetDeclarations() 
    + TransactionDeclaration[] getTransactionDeclarations() 
    + EventDeclaration[] getEventDeclarations() 
@@ -228,7 +229,7 @@ class Serializer {
    + void constructor(Factory,ModelManager,object?) 
    + void setDefaultOptions(Object) 
    + Object toJSON(Resource,Object?,boolean?,boolean?,boolean?,boolean?,boolean?,number?) throws Error
-   + Resource fromJSON(Object,Object,boolean,boolean,number?) 
+   + Resource fromJSON(Object,Object?,boolean,boolean,number?) 
 }
 class TypeNotFoundException extends BaseException {
    + void constructor(string,string?,string) 
diff --git a/packages/concerto-core/changelog.txt b/packages/concerto-core/changelog.txt
index 565037792a..a0c9e86d86 100644
--- a/packages/concerto-core/changelog.txt
+++ b/packages/concerto-core/changelog.txt
@@ -24,7 +24,7 @@
 # Note that the latest public API is documented using JSDocs and is available in api.txt.
 #
 
-Version 1.2.2 {e30709343834104db4936fc5f1c96091} 2021-11-24
+Version 1.2.2 {fb3110c45d21beac59b99bba03d41197} 2021-11-24
 - Remove custom instanceof and add methods to check runtime type
 - Remove support for Node 12
 - Generate Typescript definitions from JSDoc
diff --git a/packages/concerto-core/lib/modelmanager.js b/packages/concerto-core/lib/modelmanager.js
index 3b2f612dcf..c5f0d687c4 100644
--- a/packages/concerto-core/lib/modelmanager.js
+++ b/packages/concerto-core/lib/modelmanager.js
@@ -504,7 +504,6 @@ abstract concept Event {}
      * @param {string} qualifiedName - fully qualified type name.
      * @return {ClassDeclaration} - the class declaration for the specified type.
      * @throws {TypeNotFoundException} - if the type cannot be found or is a primitive type.
-     * @private
      */
     getType(qualifiedName) {
 
diff --git a/packages/concerto-core/lib/serializer.js b/packages/concerto-core/lib/serializer.js
index 16966771fa..29f49cbbe1 100644
--- a/packages/concerto-core/lib/serializer.js
+++ b/packages/concerto-core/lib/serializer.js
@@ -132,7 +132,7 @@ class Serializer {
      * The Resource is populated based on the JavaScript object.
      *
      * @param {Object} jsonObject The JavaScript Object for a Resource
-     * @param {Object} options - the optional serialization options
+     * @param {Object} [options] - the optional serialization options
      * @param {boolean} options.acceptResourcesForRelationships - handle JSON objects
      * in the place of strings for relationships, defaults to false.
      * @param {boolean} options.validate - validate the structure of the Resource
diff --git a/packages/concerto-core/types/lib/modelmanager.d.ts b/packages/concerto-core/types/lib/modelmanager.d.ts
index 9253c99c66..0457345522 100644
--- a/packages/concerto-core/types/lib/modelmanager.d.ts
+++ b/packages/concerto-core/types/lib/modelmanager.d.ts
@@ -184,9 +184,8 @@ declare class ModelManager {
      * @param {string} qualifiedName - fully qualified type name.
      * @return {ClassDeclaration} - the class declaration for the specified type.
      * @throws {TypeNotFoundException} - if the type cannot be found or is a primitive type.
-     * @private
      */
-    private getType;
+    getType(qualifiedName: string): ClassDeclaration;
     /**
      * Get the AssetDeclarations defined in this model manager
      * @return {AssetDeclaration[]} the AssetDeclarations defined in the model manager
diff --git a/packages/concerto-core/types/lib/serializer.d.ts b/packages/concerto-core/types/lib/serializer.d.ts
index e2758a8445..417df09ead 100644
--- a/packages/concerto-core/types/lib/serializer.d.ts
+++ b/packages/concerto-core/types/lib/serializer.d.ts
@@ -61,7 +61,7 @@ declare class Serializer {
      * The Resource is populated based on the JavaScript object.
      *
      * @param {Object} jsonObject The JavaScript Object for a Resource
-     * @param {Object} options - the optional serialization options
+     * @param {Object} [options] - the optional serialization options
      * @param {boolean} options.acceptResourcesForRelationships - handle JSON objects
      * in the place of strings for relationships, defaults to false.
      * @param {boolean} options.validate - validate the structure of the Resource
@@ -69,7 +69,7 @@ declare class Serializer {
      * @param {number} [options.utcOffset] - UTC Offset for DateTime values.
      * @return {Resource} The new populated resource
      */
-    fromJSON(jsonObject: any, options: {
+    fromJSON(jsonObject: any, options?: {
         acceptResourcesForRelationships: boolean;
         validate: boolean;
         utcOffset?: number;
diff --git a/packages/concerto-util/lib/filedownloader.js b/packages/concerto-util/lib/filedownloader.js
index fe4b0aa5ee..f566577e48 100644
--- a/packages/concerto-util/lib/filedownloader.js
+++ b/packages/concerto-util/lib/filedownloader.js
@@ -38,7 +38,6 @@ const handleJobError = async (error, job) => {
 class FileDownloader {
     /**
      * Create a FileDownloader and bind to a FileLoader.
-     * @constructor
      * @param {*} fileLoader - the loader to use to download model files
      * @param {*} getExternalImports - a function taking a file and returning new files
      * @param {Number} concurrency - the number of model files to download concurrently
diff --git a/packages/concerto-util/types/lib/filedownloader.d.ts b/packages/concerto-util/types/lib/filedownloader.d.ts
index 3a88206853..d155cdb7bd 100644
--- a/packages/concerto-util/types/lib/filedownloader.d.ts
+++ b/packages/concerto-util/types/lib/filedownloader.d.ts
@@ -6,7 +6,6 @@ export = FileDownloader;
 declare class FileDownloader {
     /**
      * Create a FileDownloader and bind to a FileLoader.
-     * @constructor
      * @param {*} fileLoader - the loader to use to download model files
      * @param {*} getExternalImports - a function taking a file and returning new files
      * @param {Number} concurrency - the number of model files to download concurrently
diff --git a/packages/concerto-util/types/lib/loaders/compositefileloader.d.ts b/packages/concerto-util/types/lib/loaders/compositefileloader.d.ts
index f556138b9c..cc6ec5fa03 100644
--- a/packages/concerto-util/types/lib/loaders/compositefileloader.d.ts
+++ b/packages/concerto-util/types/lib/loaders/compositefileloader.d.ts
@@ -17,7 +17,7 @@ declare class CompositeFileLoader {
     addFileLoader(fileLoader: any): void;
     /**
      * Get the array of FileLoader instances
-     * @return {*[]} The FileLoader registered
+     * @return {*} The FileLoader registered
      * @private
      */
     private getFileLoaders;