test_attr_easy.nit:20,5--16: Warning: Expression is already a String.
test_attr_easy.nit:20,20--26: Warning: Expression is already a B.
test_attr_easy.nit:20,44--62: Warning: Expression is already a HashMap[Int, B].
test_attr_easy.nit:20,5--16: Warning: Expression is already a String.
test_attr_easy.nit:20,20--26: Warning: Expression is already a B.
test_attr_easy.nit:20,44--62: Warning: Expression is already a HashMap[Int, B].