spyBefore
Source Location: packages/core/src/source.ts#L2302
Signature
var spyBefore: <T>(onEvent: (event: Event<T>) => void) => Operator<T, T>
Source Location: packages/core/src/source.ts#L2302
var spyBefore: <T>(onEvent: (event: Event<T>) => void) => Operator<T, T>