src/vs/workbench/contrib/logs/common/logsActions.ts/SetLogLevelAction/setLogLevelForChannel
class SetLogLevelAction:	private async setLogLevelForChannel(logChannel: IOutputChannelDescriptor): Promise<void> {
		const defaultLogLevel = this.getDefaultLogLevel(logChannel);
		const currentLogLevel = this.logLevelService.getLogLevel(logChannel.id) ?? defaultLogLevel;
		const entries = this.getLogLevelEntries(defaultLogLevel, currentLogLevel);

		const entry = await this.quickInputService.pick(entries, { placeHolder: logChannel ? nls.localize('selectLogLevelFor', " {0}: Select log level", logChannel?.label) : nls.localize('selectLogLevel', "Select log level"), activeItem: entries[this.logService.getLevel()] });
		if (entry) {
			this.logLevelService.setLogLevel(logChannel.id, entry.level);
		}
	}