interface ObservableResultimport { type ObservableResult } from "https://deno.land/x/live@1.48.5/deps.ts"; Interface that is being used in callback function for Observable Metric. Type ParametersoptionalAttributesTypes extends MetricAttributes = MetricAttributesMethodsobserve(this: ObservableResult<AttributesTypes>,value: number,attributes?: AttributesTypes,): voidObserve a measurement of the value associated with the given attributes.