Scenarios:

1) Data fetching for Data Source (say 0HR_PA_PD_1)

(i) Code to populate the values

Therefore will need the exit to write the logic.Go to CMOD and give your project name :

Press enter and select components as below :

You get the list of exits.Double click on first exit

You ll get the include. double click and enter the code. Find your data source and provide logic.