src/vs/workbench/contrib/files/common/explorerModel.ts/ExplorerItem/move
class ExplorerItem:	move(newParent: ExplorerItem): void {
		if (this.nestedParent) {
			this.nestedParent.removeChild(this);
		}
		if (this._parent) {
			this._parent.removeChild(this);
		}
		newParent.removeChild(this); // make sure to remove any previous version of the file if any
		newParent.addChild(this);
		this.updateResource(true);
	}