function returnsThisimport { returnsThis } from "https://deno.land/std@0.207.0/testing/mock.ts"; returnsThis<Self = any, Args extends unknown[] = any[]>(): (this: Self, ...args: Args) => SelfCreates a function that returns the instance the method was called on. Type ParametersoptionalSelf = anyoptionalArgs extends unknown[] = any[]Returns(this: Self, ...args: Args) => Self