test_isa.nit:25,7--19: Warning: Expression is already a Object.
test_isa.nit:34,7--19: Warning: Expression is already a Object.
test_isa.nit:43,7--28: Warning: Expression is already a nullable Object.
int:
true
true
true
true
true
true
string:
true
true
true
true
true
true
null:
true
true
true
true
true
true