import { KeysOfUnion } from 'type-fest';
export declare const MetricNames: {
    readonly NodeEnv: "diia_node_env";
    readonly GrpcStreamConnections: "diia_grpc_stream_connections";
    readonly GrpcStreamPendingClose: "diia_grpc_stream_pending_close";
};
export declare const MetricDescriptions: {
    readonly NodeEnv: "Indicates the NODE_ENV environment value";
    readonly GrpcStreamConnections: "Number of active gRPC server-stream connections";
    readonly GrpcStreamPendingClose: "Number of gRPC server-stream connections awaiting close handler completion";
};
export declare class NodeEnvLabelsMapConcrete {
    env: string;
}
export type NodeEnvLabelsMap = NodeEnvLabelsMapConcrete;
export declare const nodeEnvAllowedFields: KeysOfUnion<NodeEnvLabelsMap>[];
export declare class GrpcStreamMetricLabelsMapConcrete {
    service: string;
}
export type GrpcStreamMetricLabelsMap = GrpcStreamMetricLabelsMapConcrete;
export declare const grpcStreamMetricAllowedFields: KeysOfUnion<GrpcStreamMetricLabelsMap>[];