Can we get child record against the selected parent record through API?

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Hi Team,

I have 2 FCL field as F1_c and F2_c, in which F2_c having a parent constraint mapping. So If I selected any value from F1_c, then the corresponding mapped value will be displayed in the F2_c.
This is working fine from the application. The same scenario we need to implement in DCS too where there is no option to filter the F2_c value. Through manual customizaion we can achieve but it should not be productive.
So is it possible to get the child value(F2_c) through API?

Thanks,
Shaheela

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