Added property not reflecting in back end method

I have a standard Odata service . There is one action which has been implemented as Function Import .

I added one more parameter to that Function Import after t extending the service . But when I place a debugger at the back end method generated for the Function Import .I dont see that added Parameter

In the below screenshot I have highlighted the added property , but in IT_PARAMETERS the property is not visible even though i have added it .in the URL

Could somebody help whether I am missing anything

Ankit Maskara

Mahesh Kumar Palavalli

Filip Nespor

Thanks in advance for the help !!