docs: Add documentation for enums (#257)

* docs: Add documentation for enums

fix: Add context manager return types

chore: Update gapic-generator-python to v1.8.1
PiperOrigin-RevId: 503210727

Source-Link: googleapis/googleapis@a391fd1

Source-Link: googleapis/googleapis-gen@0080f83
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMDA4MGY4MzBkZWMzN2MzMzg0MTU3MDgyYmNlMjc5ZTM3MDc5ZWE1OCJ9

* 🦉 Updates from OwlBot post-processor

See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

packages/google-cloud-billing-budgets/google/cloud/billing/budgets_v1/services/budget_service/client.py

@@ -1012,7 +1012,7 @@ def sample_delete_budget():
             metadata=metadata,
         )
 
-    def __enter__(self):
+    def __enter__(self) -> "BudgetServiceClient":
         return self
 
     def __exit__(self, type, value, traceback):

packages/google-cloud-billing-budgets/google/cloud/billing/budgets_v1/types/budget_model.py

@@ -40,6 +40,19 @@ class CalendarPeriod(proto.Enum):
     period that has a canonical start. Grammatically, "the start of the
     current ``CalendarPeriod``". All calendar times begin at 12 AM US
     and Canadian Pacific Time (UTC-8).
+
+    Values:
+        CALENDAR_PERIOD_UNSPECIFIED (0):
+
+        MONTH (1):
+            A month. Month starts on the first day of
+            each month, such as January 1, February 1, March
+            1, and so on.
+        QUARTER (2):
+            A quarter. Quarters start on dates January 1,
+            April 1, July 1, and October 1 of each year.
+        YEAR (3):
+            A year. Year starts on January 1.
     """
     CALENDAR_PERIOD_UNSPECIFIED = 0
     MONTH = 1
@@ -201,6 +214,20 @@ class ThresholdRule(proto.Message):
     class Basis(proto.Enum):
         r"""The type of basis used to determine if spend has passed the
         threshold.
+
+        Values:
+            BASIS_UNSPECIFIED (0):
+                Unspecified threshold basis.
+            CURRENT_SPEND (1):
+                Use current spend as the basis for comparison
+                against the threshold.
+            FORECASTED_SPEND (2):
+                Use forecasted spend for the period as the basis for
+                comparison against the threshold. FORECASTED_SPEND can only
+                be set when the budget's time period is a
+                [Filter.calendar_period][google.cloud.billing.budgets.v1.Filter.calendar_period].
+                It cannot be set in combination with
+                [Filter.custom_period][google.cloud.billing.budgets.v1.Filter.custom_period].
         """
         BASIS_UNSPECIFIED = 0
         CURRENT_SPEND = 1
@@ -363,6 +390,24 @@ class CreditTypesTreatment(proto.Enum):
         applicable selected credits. `See the documentation for a list of
         credit
         types <https://cloud.google.com/billing/docs/how-to/export-data-bigquery-tables#credits-type>`__.
+
+        Values:
+            CREDIT_TYPES_TREATMENT_UNSPECIFIED (0):
+
+            INCLUDE_ALL_CREDITS (1):
+                All types of credit are subtracted from the
+                gross cost to determine the spend for threshold
+                calculations.
+            EXCLUDE_ALL_CREDITS (2):
+                All types of credit are added to the net cost
+                to determine the spend for threshold
+                calculations.
+            INCLUDE_SPECIFIED_CREDITS (3):
+                `Credit
+                types <https://cloud.google.com/billing/docs/how-to/export-data-bigquery-tables#credits-type>`__
+                specified in the credit_types field are subtracted from the
+                gross cost to determine the spend for threshold
+                calculations.
         """
         CREDIT_TYPES_TREATMENT_UNSPECIFIED = 0
         INCLUDE_ALL_CREDITS = 1

packages/google-cloud-billing-budgets/google/cloud/billing/budgets_v1beta1/services/budget_service/client.py

@@ -879,7 +879,7 @@ def sample_delete_budget():
             metadata=metadata,
         )
 
-    def __enter__(self):
+    def __enter__(self) -> "BudgetServiceClient":
         return self
 
     def __exit__(self, type, value, traceback):

packages/google-cloud-billing-budgets/google/cloud/billing/budgets_v1beta1/types/budget_model.py

@@ -40,6 +40,21 @@ class CalendarPeriod(proto.Enum):
     period that has a canonical start. Grammatically, "the start of the
     current ``CalendarPeriod``". All calendar times begin at 12 AM US
     and Canadian Pacific Time (UTC-8).
+
+    Values:
+        CALENDAR_PERIOD_UNSPECIFIED (0):
+            Calendar period is unset. This is the default
+            if the budget is for a custom time period
+            (CustomPeriod).
+        MONTH (1):
+            A month. Month starts on the first day of
+            each month, such as January 1, February 1, March
+            1, and so on.
+        QUARTER (2):
+            A quarter. Quarters start on dates January 1,
+            April 1, July 1, and October 1 of each year.
+        YEAR (3):
+            A year. Year starts on January 1.
     """
     CALENDAR_PERIOD_UNSPECIFIED = 0
     MONTH = 1
@@ -216,6 +231,20 @@ class ThresholdRule(proto.Message):
     class Basis(proto.Enum):
         r"""The type of basis used to determine if spend has passed the
         threshold.
+
+        Values:
+            BASIS_UNSPECIFIED (0):
+                Unspecified threshold basis.
+            CURRENT_SPEND (1):
+                Use current spend as the basis for comparison
+                against the threshold.
+            FORECASTED_SPEND (2):
+                Use forecasted spend for the period as the basis for
+                comparison against the threshold. FORECASTED_SPEND can only
+                be set when the budget's time period is a
+                [Filter.calendar_period][google.cloud.billing.budgets.v1beta1.Filter.calendar_period].
+                It cannot be set in combination with
+                [Filter.custom_period][google.cloud.billing.budgets.v1beta1.Filter.custom_period].
         """
         BASIS_UNSPECIFIED = 0
         CURRENT_SPEND = 1
@@ -381,6 +410,24 @@ class CreditTypesTreatment(proto.Enum):
         applicable selected credits. `See the documentation for a list of
         credit
         types <https://cloud.google.com/billing/docs/how-to/export-data-bigquery-tables#credits-type>`__.
+
+        Values:
+            CREDIT_TYPES_TREATMENT_UNSPECIFIED (0):
+
+            INCLUDE_ALL_CREDITS (1):
+                All types of credit are subtracted from the
+                gross cost to determine the spend for threshold
+                calculations.
+            EXCLUDE_ALL_CREDITS (2):
+                All types of credit are added to the net cost
+                to determine the spend for threshold
+                calculations.
+            INCLUDE_SPECIFIED_CREDITS (3):
+                `Credit
+                types <https://cloud.google.com/billing/docs/how-to/export-data-bigquery-tables#credits-type>`__
+                specified in the credit_types field are subtracted from the
+                gross cost to determine the spend for threshold
+                calculations.
         """
         CREDIT_TYPES_TREATMENT_UNSPECIFIED = 0
         INCLUDE_ALL_CREDITS = 1

packages/google-cloud-billing-budgets/samples/generated_samples/snippet_metadata_google.cloud.billing.budgets.v1.json

@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-billing-budgets",
-    "version": "1.9.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {

packages/google-cloud-billing-budgets/samples/generated_samples/snippet_metadata_google.cloud.billing.budgets.v1beta1.json

@@ -8,7 +8,7 @@
     ],
     "language": "PYTHON",
     "name": "google-cloud-billing-budgets",
-    "version": "1.9.0"
+    "version": "0.1.0"
   },
   "snippets": [
     {