vendor/kinetic-v5.1.0.js
function() {
            var layers = this.children,
                len = layers.length,
                n;

            for(n = 0; n < len; n++) {
                layers[n].clear();
            }
            return this;
        }
function() {
            var layers = this.children,
                len = layers.length,
                n;

            for(n = 0; n < len; n++) {
                layers[n].clear();
            }
            return this;
        }
function ( ) { var layers = this . children , len = layers . length , n ; for ( n = 0 ; n < len ; n ++ ) { layers [ n ] . clear ( ) ; } return this ; }
clear all layers
@method
@memberof Kinetic.Stage.prototype
clear all layers