parameters: (self)
docstring: Called at the beginning of a request before  `get`/`post`/etc.
  
          Override this method to perform common initialization regardless
          of the request method.
  
          Asynchronous support: Use ``async def`` or decorate this method with
          `.gen.coroutine` to make it asynchronous.
          If this method returns an  ``Awaitable`` execution will not proceed
          until the ``Awaitable`` is done.
  
          .. versionadded:: 3.1
             Asynchronous support.
docstring_summary: Called at the beginning of a request before  `get`/`post`/etc.
docstring_tokens: Called at the beginning of a request before get / post / etc .
function: def prepare(self) -> Optional[Awaitable[None]]:
          """Called at the beginning of a request before  `get`/`post`/etc.
  
          Override this method to perform common initialization regardless
          of the request method.
  
          Asynchronous support: Use ``async def`` or decorate this method with
          `.gen.coroutine` to make it asynchronous.
          If this method returns an  ``Awaitable`` execution will not proceed
          until the ``Awaitable`` is done.
  
          .. versionadded:: 3.1
             Asynchronous support.
          """
          pass
function_tokens: def prepare ( self ) -> Optional [ Awaitable [ None ] ] : pass