def binding_of(self, typevar):
if typevar in self._ns:<EOL><INDENT>return self._ns[typevar]<EOL><DEDENT>if self._instance_ns and typevar in self._instance_ns:<EOL><INDENT>return self._instance_ns[typevar]<EOL><DEDENT>return None<EOL>
Returns the type the typevar is bound to, or None.