src/vs/workbench/contrib/files/browser/views/explorerView.ts/ExplorerView/styleListDropBackground
class ExplorerView:	styleListDropBackground(styles: IExplorerViewStyles): void {
		const content: string[] = [];

		if (styles.listDropBackground) {
			content.push(`.explorer-viewlet .explorer-item .monaco-icon-name-container.multiple > .label-name.drop-target > .monaco-highlighted-label { background-color: ${styles.listDropBackground}; }`);
		}

		const newStyles = content.join('\n');
		if (newStyles !== this.styleElement.textContent) {
			this.styleElement.textContent = newStyles;
		}
	}