This is the microflow of the Mendix file import template, and how to modify it allows me to select the specified rows and columns to import. My idea is to retrieve the rows and columns, and then filter through the java operations to find the specified rows and columns to import. I don't know how to do it and I hope you can give me an answer!! Thank you very much
Could you elaborate why you would edit the microflow in the module? When you update the module all your changes will be erased. What are you trying to achieve here?
Try to follow the step as below:
Add a main entity to reference data from excel.
Configure your template to reference that object.
Create an object in the microflow within StartImport.
Retrieve your data from the object.
Done (in Mendix 9.24 you can get data from List Operation with Length.)