code: function(a, b, c, d) {
              var e = this.get('markers');
              for ( f in e ) {
                  var g = ( c && e[f][a] ) ? ( $.inArray(b, e[f][a].split(c)) > -1 ) : ( e[f][a] === b );
                  this._call(d, e[f], g);
              };
          }
docs: Returns the marker(s) with a specific property and value, e.g. 'category', 'tags'
  @param property:string the property to search within
  @param value:string
  @param delimiter:string/boolean  a delimiter if it's multi-valued otherwise false
  @param callback:function(marker:google.maps.Marker, isFound:boolean)