List columns for a workbook element

This endpoint retrieves a list of columns associated with a specific element within a workbook. It provides metadata about each column, such as name and formula, which can be essential for understanding the data structure and for further data manipulation or analysis. ### Usage notes - Retrieve the **workbookId** by calling the [/v2/workbooks](https://help.sigmacomputing.com/reference/list-workbooks) endpoint. - Retrieve the **elementId** by first calling the [/v2/workbooks/{workbookId}/pages](https://help.sigmacomputing.com/reference/list-workbook-pages) endpoint, then calling the [/v2/workbooks/{workbookId}/pages/{pageId}/elements](https://help.sigmacomputing.com/reference/list-workbook-page-elements) endpoint. ### Usage scenarios - **Data exploration:** Helps users to explore the data structure of a workbook element, facilitating deeper analysis and understanding. - **Integration tasks:** Useful for developers integrating Sigma with other tools, needing to know the data structure to map data accurately. ### Best practices - Validate the elementId to make sure it corresponds to the correct workbook element before querying. - Leverage this endpoint when setting up interfaces that require specific knowledge about the data structure.