def getfixturedefs(self, argname, nodeid):
try:<EOL><INDENT>fixturedefs = self._arg2fixturedefs[argname]<EOL><DEDENT>except KeyError:<EOL><INDENT>return None<EOL><DEDENT>return tuple(self._matchfactories(fixturedefs, nodeid))<EOL>
Gets a list of fixtures which are applicable to the given node id.

:param str argname: name of the fixture to search for
:param str nodeid: full node id of the requesting test.
:return: list[FixtureDef]