start
inline suspend fun <I : Any, M : Any, O : Any> Workflow2<I, M, O>.start(input: I, vararg attachments: Attachment): WorkflowRun<O>
inline suspend fun <I : Any, M1 : Any, M2 : Any, O : Any> Workflow3<I, M1, M2, O>.start(input: I, vararg attachments: Attachment): WorkflowRun<O>