src/viewer.js
function( element ) {
        var i;

        element = $.getElement( element );
        i = getOverlayIndex( this.currentOverlays, element );

        if (i >= 0) {
            return this.currentOverlays[i];
        } else {
            return null;
        }
    }
function( element ) {
        var i;

        element = $.getElement( element );
        i = getOverlayIndex( this.currentOverlays, element );

        if (i >= 0) {
            return this.currentOverlays[i];
        } else {
            return null;
        }
    }
function ( element ) { var i ; element = $ . getElement ( element ) ; i = getOverlayIndex ( this . currentOverlays , element ) ; if ( i >= 0 ) { return this . currentOverlays [ i ] ; } else { return null ; } }
Finds an overlay identified by the reference element or element id
and returns it as an object, return null if not found.
@method
@param {Element|String} element - A reference to the element or an
element id which represents the overlay content.
@return {OpenSeadragon.Overlay} the matching overlay or null if none found.
Finds an overlay identified by the reference element or element id and returns it as an object return null if not found .