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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _GetElementDataTypeDefinition(self, data_type_definition):
 """Retrieves the element data type definition. Args: data_type_definition (DataTypeDefinition):
 data type definition. Returns: DataTypeDefinition: element data type definition. Raises: FormatError: if the element data type cannot be determined from the data type definition. """

    if not data_type_definition:
      raise errors.FormatError('Missing data type definition')

    element_data_type_definition = getattr(
        data_type_definition, 'element_data_type_definition', None)
    if not element_data_type_definition:
      raise errors.FormatError(
          'Invalid data type definition missing element')

    return element_data_type_definition