Declaring a PrismaClient with conditional logging

export class DatabaseClient {
  private _prismaClient;

  constructor(databaseUrl: string, appInsightsClient?: appInsights.TelemetryClient) {
    const logDefinitions: Prisma.LogDefinition[] = [
      {
        level: "error",
        emit: "event",
      },
      {
        level: "warn",
        emit: "event",
      },
    ];

    this._prismaClient = new PrismaClient({
      datasourceUrl: databaseUrl,
      log: logDefinitions,
    });

    if (someCondition) {
      this._prismaClient.$on("error", (evt: Prisma.LogEvent) => {
        // Do som error logging stuff
      });
    }
  }