def memory_usage(self):
data = super(Field, self).memory_usage()<EOL>values = <NUM_LIT:0><EOL>for value in self.field_values:<EOL><INDENT>values += value.memory_usage()<EOL><DEDENT>data['<STR_LIT>'] = values<EOL>return data<EOL>
Get the combined memory usage of the field data and field values.