Specific type for _logs

type LogLevel =
  | "emergency"
  | "alert"
  | "critical"
  | "error"
  | "warning"
  | "notice"
  | "info"
  | "debug";

type LogList = {
  [key in LogLevel]: Array<string>;
};

export class Log {
  _logs: LogList = {
    emergency: [],
    alert: [],
    critical: [],
    error: [],
    warning: [],
    notice: [],
    info: [],
    debug: [],
  };

  constructor() {}

  add(level: LogLevel, message: string): void {
    this._logs[level].push(message);
  }

  emergency(message: string): void {
    this.add("emergency", message);
  }

  alert(message: string): void {
    this.add("alert", message);
  }

  critical(message: string): void {
    this.add("critical", message);
  }

  error(message: string): void {
    this.add("error", message);
  }

  warning(message: string): void {
    this.add("warning", message);
  }

  notice(message: string): void {
    this.add("notice", message);
  }

  info(message: string): void {
    this.add("notice", message);
  }

  debug(message: string): void {
    this.add("debug", message);
  }

  get logs(): LogList {
    return this._logs;
  }
}