add parents properties

Author: sunag

src/nodes/core/Node.js

@@ -87,6 +87,14 @@ class Node extends EventDispatcher {
 		 */
 		this.global = false;
 
+		/**
+		 * Create a list of parents for this node during the build process.
+		 *
+		 * @type {boolean}
+		 * @default false
+		 */
+		this.parents = false;
+
 		/**
 		 * This flag can be used for type testing.
 		 *
@@ -643,6 +651,14 @@ class Node extends EventDispatcher {
 
 					if ( childNode && childNode.isNode === true ) {
 
+						if ( childNode.parents === true ) {
+
+							const childProperties = builder.getNodeProperties( childNode );
+							childProperties.parents = childProperties.parents || [];
+							childProperties.parents.push( this );
+
+						}
+
 						childNode.build( builder );
 
 					}