ToolCallsStep
constructor( id: RunStepId, createdAt: Int, assistantId: AssistantId, threadId: ThreadId, runId: RunId, status: Status, stepDetails: ToolCallStepDetails, lastError: LastError? = null, expiredAt: Int? = null, cancelledAt: Int? = null, failedAt: Int? = null, completedAt: Int? = null, metadata: Map<String, String>? = null)