DataFlowDebugCommandPayload Class    
Structure of command payload.
All required parameters must be populated in order to send to server.
Constructor
DataFlowDebugCommandPayload(*, stream_name: str, row_limits: int | None = None, columns: List[str] | None = None, expression: str | None = None, **kwargs: Any)Keyword-Only Parameters
| Name | Description | 
|---|---|
| stream_name | The stream name which is used for preview. Required. | 
| row_limits | Row limits for preview response. Default value: None | 
| columns | Array of column names. Default value: None | 
| expression | The expression which is used for preview. Default value: None |