Custom Gallery Template Workbook - repository of JSON templates

[mark-kramtest]

we have multiple custom workbooks in Sentinel and need to manage their content programmatically.

I found out these are not ARM based resoruces, but Gallery Templates, hence their code definition is not accessible through Azure Resource Graph Explorer. Question is - how to access their content? E.g. we need to find out if specific KQL related column is used in any of our workbooks. Currently I see only a manual way of doing this through Sentinel Portal.