def set_default(self, value):
if value is None:<EOL><INDENT>self.__default = value<EOL><DEDENT>elif not isinstance(value, str):<EOL><INDENT>raise TypeError("<STR_LIT>")<EOL><DEDENT>else:<EOL><INDENT>self.__default = value<EOL><DEDENT>
Setter for 'default' field.
:param value - a new value of 'default' field. Must be either None (default is optional according to
BPMN 2.0 XML Schema) or String.