src/leaflet-webgl-heatmap.js
function () {
        delete this.gl;
        L.DomUtil.remove(this._container);
        L.DomEvent.off(this._container);
        delete this._container;
    }
function () {
        delete this.gl;
        L.DomUtil.remove(this._container);
        L.DomEvent.off(this._container);
        delete this._container;
    }
function ( ) { delete this . gl ; L . DomUtil . remove ( this . _container ) ; L . DomEvent . off ( this . _container ) ; delete this . _container ; }
onRemove-ish
onRemove - ish