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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 CreateDataTypeMapByType(cls, data_type_definition):
 """Creates a specific data type map by type indicator. Args: data_type_definition (DataTypeDefinition):
 data type definition. Returns: DataTypeMap: data type map or None if the date type definition is not available. """

    data_type_map_class = cls._MAP_PER_DEFINITION.get(
        data_type_definition.TYPE_INDICATOR, None)
    if not data_type_map_class:
      return None

    return data_type_map_class(data_type_definition)