chore: use gapic-generator-python 0.52.0 (#217)

- [ ] Regenerate this pull request now.

fix: improper types in pagers generation
PiperOrigin-RevId: 399773015

Source-Link: googleapis/googleapis@410c184

Source-Link: googleapis/googleapis-gen@290e883
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiMjkwZTg4MzU0NWUzYWM5ZmYyYmQwMGNkMGRhY2IyOGYxYjhjYTk0NSJ9

google/cloud/documentai_v1beta3/services/document_processor_service/pagers.py

@@ -15,13 +15,13 @@
 #
 from typing import (
     Any,
-    AsyncIterable,
+    AsyncIterator,
     Awaitable,
     Callable,
-    Iterable,
     Sequence,
     Tuple,
     Optional,
+    Iterator,
 )
 
 from google.cloud.documentai_v1beta3.types import document_processor_service
@@ -75,14 +75,14 @@ def __getattr__(self, name: str) -> Any:
         return getattr(self._response, name)
 
     @property
-    def pages(self) -> Iterable[document_processor_service.ListProcessorsResponse]:
+    def pages(self) -> Iterator[document_processor_service.ListProcessorsResponse]:
         yield self._response
         while self._response.next_page_token:
             self._request.page_token = self._response.next_page_token
             self._response = self._method(self._request, metadata=self._metadata)
             yield self._response
 
-    def __iter__(self) -> Iterable[processor.Processor]:
+    def __iter__(self) -> Iterator[processor.Processor]:
         for page in self.pages:
             yield from page.processors
 
@@ -141,14 +141,14 @@ def __getattr__(self, name: str) -> Any:
     @property
     async def pages(
         self,
-    ) -> AsyncIterable[document_processor_service.ListProcessorsResponse]:
+    ) -> AsyncIterator[document_processor_service.ListProcessorsResponse]:
         yield self._response
         while self._response.next_page_token:
             self._request.page_token = self._response.next_page_token
             self._response = await self._method(self._request, metadata=self._metadata)
             yield self._response
 
-    def __aiter__(self) -> AsyncIterable[processor.Processor]:
+    def __aiter__(self) -> AsyncIterator[processor.Processor]:
         async def async_generator():
             async for page in self.pages:
                 for response in page.processors: