LangfuseCoreOptions: {
    _isLocalEventExportEnabled?: boolean;
    _projectId?: string;
    additionalHeaders?: Record<string, string>;
    baseUrl?: string;
    enabled?: boolean;
    fetchRetryCount?: number;
    fetchRetryDelay?: number;
    flushAt?: number;
    flushInterval?: number;
    mask?: MaskFunction;
    publicKey?: string;
    release?: string;
    requestTimeout?: number;
    sampleRate?: number;
    sdkIntegration?: string;
    secretKey?: string;
}