Data transformation

Hi Team,

I am trying to call  Datetime in CUSTOM.Training.Functions class please refer the below line.

<assign value='##class(CUSTOM.Training.Functions).DateTime(source.{PIDgrpgrp().PIDgrp.PID:7.1})' property='target.{PID:7.1}' action='set' />

My Datetime method 

ClassMethod DateTime(DateTime As %Integer)
{
Set Year = msg.SetValueAt(,"PIDgrpgrp().PIDgrp.PID:7.1","set")
Q Year
}
 

But i am not able to get the value of date of birth into the Datetime method, Kindly help how to get data of date of birth value into the method.

Thanks in advance