Returns an iterator of the contents contents of a file at a specific Commit.

        Params:
        * commit: A tuple, string, or Commit object representing the commit.
        * path: The path of the file.
        * offset_bytes: Optional. specifies a number of bytes that should be
        skipped in the beginning of the file.
        * size_bytes: Optional. limits the total amount of data returned, note
        you will get fewer bytes than size if you pass a value larger than the
        size of the file. If size is set to 0 then all of the data will be
        returned.
        * extract_value: If True, then an ExtractValueIterator will be return,
        which will iterate over the bytes of the file. If False, then the
        protobuf response iterator will return.

def get_file(self, commit, path, offset_bytes=0, size_bytes=0, extract_value=True):
        """
        Returns an iterator of the contents contents of a file at a specific Commit.

        Params:
        * commit: A tuple, string, or Commit object representing the commit.
        * path: The path of the file.
        * offset_bytes: Optional. specifies a number of bytes that should be
        skipped in the beginning of the file.
        * size_bytes: Optional. limits the total amount of data returned, note
        you will get fewer bytes than size if you pass a value larger than the
        size of the file. If size is set to 0 then all of the data will be
        returned.
        * extract_value: If True, then an ExtractValueIterator will be return,
        which will iterate over the bytes of the file. If False, then the
        protobuf response iterator will return.
        """
        req = proto.GetFileRequest(
            file=proto.File(commit=commit_from(commit), path=path),
            offset_bytes=offset_bytes,
            size_bytes=size_bytes
        )
        res = self.stub.GetFile(req, metadata=self.metadata)
        if extract_value:
            return ExtractValueIterator(res)
        return res