src/vs/workbench/api/common/extHostCommands.ts/ExtHostCommands/getCommands
class ExtHostCommands:	getCommands(filterUnderscoreCommands: boolean = false): Promise<string[]> {
		this._logService.trace('ExtHostCommands#getCommands', filterUnderscoreCommands);

		return this.#proxy.$getCommands().then(result => {
			if (filterUnderscoreCommands) {
				result = result.filter(command => command[0] !== '_');
			}
			return result;
		});
	}