src/vs/workbench/contrib/files/common/explorerModel.ts/ExplorerItem/addChild
class ExplorerItem:	addChild(child: ExplorerItem): void {
		// Inherit some parent properties to child
		child._parent = this;
		child.updateResource(false);
		this.children.set(this.getPlatformAwareName(child.name), child);
	}