docs: function extractSetterFromNode( handler, node ) {
  
  	assignSetterFnForNode( handler, node );
  
  	if ( node.children ) {
  		// Recurse down to this node's children
  		Object.keys( node.children ).forEach( ( key ) => {
  			extractSetterFromNode( handler, node.children[ key ] );
  		} );
  	}
  }