method SpyStubBuilder.prototype.returnValueimport { SpyStubBuilder } from "https://deno.land/x/rhum@v2.1.0-rc.1/src/spy/spy_stub_builder.ts"; returnValue(returnValue: ReturnValue): thisSet the return value of this spy stub. ParametersreturnValue: ReturnValue The value to return when this spy stub is called. Returnsthisthis To allow method chaining.