src/xblocks/block.js
function wrapperAccessorsSetUpdate(accessorName, nextValue, prevValue) {
    if (nextValue !== prevValue && this.xprops.hasOwnProperty(accessorName) && this.mounted) {
        this[ Constants.BLOCK ].update();
    }
}
function wrapperAccessorsSetUpdate(accessorName, nextValue, prevValue) {
    if (nextValue !== prevValue && this.xprops.hasOwnProperty(accessorName) && this.mounted) {
        this[ Constants.BLOCK ].update();
    }
}
Update element when a property is changed.
@example
// call node.xblock.update();
_.wrap("accessor-name", wrapperAccessorsSetUpdate).call(node, 'newValue', 'oldValue');
@param {string} accessorName the name of the property
@param {*} nextValue
@param {*} prevValue
@this HTMLElement
@private