// getTypeKey return the correct JSON key for the specific type, ie type,ref,or enumRef
func (gen *testGenerator) getTypeKey(t *idl.Type) string {
var s string
if t.IsEnum(gen.tplRootIdl) {
s = "enumRef"
} else if t.IsStruct(gen.tplRootIdl) {
s = "ref"
} else {
s = "type"
}
return s
}