docs: function depend(p) {
  	var s = '';
  	var a = toArray(p);
  
  	for (var i in a) {
  		if (a[i].filter) {
  			s += '* Dependency on filter '+a[i].filter+(a[i].value ? ' value: '+a[i].value : '')+'\n';
  		}
  		if (a[i].mixin) {
  			s += '* Dependency on mixin '+a[i].mixin+'\n';
  		}
  	}
  	return s;
  }