Returns iterator or method or '' depending on object type.

def chpl_type_name(self):
        """Returns iterator or method or '' depending on object type."""
        if not self.objtype.endswith('method'):
            return ''
        elif self.objtype.startswith('iter'):
            return 'iterator'
        elif self.objtype == 'method':
            return 'method'
        else:
            return ''