Question: Is there a maple command that can change the order of integral?

Hello,friends.I want to know is there any maple command that can change the order of integral?I searched the Student package and the DEtools,can not find it.

for instance,there is an integral 

int(f(x,y),y=sqrt(4*x-x^2)..2*sqrt(x),x=0..4), 

it first integral y then integral x.I want the integral order be x then y. I appreciate your help!

 

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