Method failCause

packages/effect/src/internal/mailbox.ts:197–199

(cause: Cause<E>)

    return this.done(core.exitFail(error))
  }
  failCause(cause: Cause<E>) {
    return this.done(core.exitFailCause(cause))
  }
  unsafeDone(exit: Exit<void, E>): boolean {
    if (this.state._tag !== "Open") {
      return false