base_isa_gen2.nit:39,8--22: Warning: expression is already a `A[Object]`.
base_isa_gen2.nit:41,8--22: Warning: expression is already a `A[Object]` since it is a `B[Object]`.
base_isa_gen2.nit:44,8--22: Warning: expression is already a `A[Object]` since it is a `C[Object]`.
base_isa_gen2.nit:48,8--22: Warning: expression is already a `A[Object]` since it is a `D[Object, Object]`.
true