static/tinymce/plugins/noneditable/editor_plugin_src.js
function getNonEditableParent(node) {
			var state;

			while (node) {
				state = getContentEditable(node);
				if (state) {
					return state  === "false" ? node : null;
				}

				node = node.parentNode;
			}
		}
function getNonEditableParent(node) {
			var state;

			while (node) {
				state = getContentEditable(node);
				if (state) {
					return state  === "false" ? node : null;
				}

				node = node.parentNode;
			}
		}
Returns the noneditable parent or null if there is a editable before it or if it wasn't found