js/leaflet.markercluster.js
function (id) {
    var result = null;

    this.eachLayer(function (l) {
      if (L.stamp(l) === id) {
        result = l;
      }
    });

    return result;
  }
function (id) {
    var result = null;

    this.eachLayer(function (l) {
      if (L.stamp(l) === id) {
        result = l;
      }
    });

    return result;
  }
function ( id ) { var result = null ; this . eachLayer ( function ( l ) { if ( L . stamp ( l ) === id ) { result = l ; } } ) ; return result ; }
Overrides LayerGroup.getLayer, WARNING: Really bad performance
Overrides LayerGroup . getLayer WARNING : Really bad performance