MetricKeyType

declare const counter: <A extends number | bigint>() => MetricKeyType.Counter<A>

declare const frequency: (options?: {
  readonly preregisteredWords?: ReadonlyArray<string>;
}) => MetricKeyType.Frequency

declare const gauge: <A extends number | bigint>() => MetricKeyType.Gauge<A>

declare const histogram: (boundaries: MetricBoundaries.MetricBoundaries) => MetricKeyType.Histogram

declare const summary: (options: {
  readonly error: number;
  readonly maxAge: Duration.DurationInput;
  readonly maxSize: number;
  readonly quantiles: ReadonlyArray<number>;
}) => MetricKeyType.Summary

interface MetricKeyType<in In, out Out> extends Variance<In, Out>, Equal, Pipeable {}

declare const isCounterKey: (u: unknown) => u is MetricKeyType.Counter<number | bigint>

declare const isFrequencyKey: (u: unknown) => u is MetricKeyType.Frequency

declare const isGaugeKey: (u: unknown) => u is MetricKeyType.Gauge<number | bigint>

declare const isHistogramKey: (u: unknown) => u is MetricKeyType.Histogram

declare const isMetricKeyType: (u: unknown) => u is MetricKeyType<unknown, unknown>

declare const isSummaryKey: (u: unknown) => u is MetricKeyType.Summary

declare const CounterKeyTypeTypeId: unique symbol

type CounterKeyTypeTypeId = typeof CounterKeyTypeTypeId

declare const FrequencyKeyTypeTypeId: unique symbol

type FrequencyKeyTypeTypeId = typeof FrequencyKeyTypeTypeId

declare const GaugeKeyTypeTypeId: unique symbol

type GaugeKeyTypeTypeId = typeof GaugeKeyTypeTypeId

declare const HistogramKeyTypeTypeId: unique symbol

type HistogramKeyTypeTypeId = typeof HistogramKeyTypeTypeId

declare const MetricKeyTypeTypeId: unique symbol

type MetricKeyTypeTypeId = typeof MetricKeyTypeTypeId

declare const SummaryKeyTypeTypeId: unique symbol

type SummaryKeyTypeTypeId = typeof SummaryKeyTypeTypeId