code: Rule MeterNum() {
  		return Sequence(
  				MeterNum2(),
  				OptionalS(
  					Sequence(
  						OneOrMore(SP()),
  						MeterNum2()
  					)
  				)
  		).label(MeterNum).suppressSubnodes();
  	}
docs: meter-num ::= (1*DIGIT *("+" 1*DIGIT) "/" 1*DIGIT) [1*SP meter-num]<p>
  e.g. 2/4 , 6/8 , 2+2+3/16 , 11/8 , 2/4 3/4 , 2+2+3/8 2+2+3+2+2+2/8