Question: Get the module of a export

How could we get module which contain this export, for example

I have

m1 := module export a; end module;

 temp := m:-a;

evalb(temp = a);
 # false
evalb(temp = m:-a);
 # true 

 but how could I get back the module like this

temp2 := getModule(temp); 

temp2;

 # m

evalb(temp2 = m) ;

# true 

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