MAKE_REF          700 gst/parse/grammar.y reference:	REF 			      { MAKE_REF ($$, $1, NULL); }
MAKE_REF          701 gst/parse/grammar.y 	|	REF padlist		      { MAKE_REF ($$, $1, $2); }
MAKE_REF          705 gst/parse/grammar.y 	|	pads			      { MAKE_REF ($$, NULL, $1); }
MAKE_REF          706 gst/parse/grammar.y 	|	/* NOP */		      { MAKE_REF ($$, NULL, NULL); }