src/vs/workbench/contrib/snippets/browser/snippetsFile.ts/SnippetFile/_load
class SnippetFile:	private async _load(): Promise<string> {
		if (this._extension) {
			return this._extensionResourceLoaderService.readExtensionResource(this.location);
		} else {
			const content = await this._fileService.readFile(this.location);
			return content.value.toString();
		}
	}