Search usage of psiClass and cast reference back to psiMethod

I have a inner class B on a class A : 

Class A {

 private void methodA(){
   new B().methodB();
 }
 
 private Class B{
     private void methodB(){
     }
  }

}

I am using ReferenceSearch to search the usage of class b but after i retrieve the reference i dont know how to retrieve the method methodA  from it:

ReferencesSearch.search(psiClassB).forEach(psiReference->{
   PsiMethod methodA = ????
});