def __init__(self, name, full_name, filename, containing_type, fields,
               nested_types, enum_types, extensions, options=None,
               serialized_options=None,
               is_extendable=True, extension_ranges=None, oneofs=None,
               file=None, serialized_start=None, serialized_end=None,  # pylint: disable=redefined-builtin
               syntax=None, create_key=None):
    """Arguments to __init__() are as described in the description
    of Descriptor fields above.

    Note that filename is an obsolete argument, that is not used anymore.
    Please use file.name to access this as an attribute.
    """
    if create_key is not _internal_create_key:
      _Deprecated('Descriptor')

    super(Descriptor, self).__init__(
        options, 'MessageOptions', name, full_name, file,
        containing_type, serialized_start=serialized_start,
        serialized_end=serialized_end, serialized_options=serialized_options)

    # We have fields in addition to fields_by_name and fields_by_number,
    # so that:
    #   1. Clients can index fields by "order in which they're listed."
    #   2. Clients can easily iterate over all fields with the terse
    #      syntax: for f in descriptor.fields: ...
    self.fields = fields
    for field in self.fields:
      field.containing_type = self
    self.fields_by_number = dict((f.number, f) for f in fields)
    self.fields_by_name = dict((f.name, f) for f in fields)
    self._fields_by_camelcase_name = None

    self.nested_types = nested_types
    for nested_type in nested_types:
      nested_type.containing_type = self
    self.nested_types_by_name = dict((t.name, t) for t in nested_types)

    self.enum_types = enum_types
    for enum_type in self.enum_types:
      enum_type.containing_type = self
    self.enum_types_by_name = dict((t.name, t) for t in enum_types)
    self.enum_values_by_name = dict(
        (v.name, v) for t in enum_types for v in t.values)

    self.extensions = extensions
    for extension in self.extensions:
      extension.extension_scope = self
    self.extensions_by_name = dict((f.name, f) for f in extensions)
    self.is_extendable = is_extendable
    self.extension_ranges = extension_ranges
    self.oneofs = oneofs if oneofs is not None else []
    self.oneofs_by_name = dict((o.name, o) for o in self.oneofs)
    for oneof in self.oneofs:
      oneof.containing_type = self
    self.syntax = syntax or "proto2"
Arguments to __init__() are as described in the description
    of Descriptor fields above.

    Note that filename is an obsolete argument, that is not used anymore.
    Please use file.name to access this as an attribute.
    
deps/protobuf/python/google/protobuf/descriptor.py