Converts Uppercase field in JSON to lowercase dart class when generating

[Gurjot95]

If a JSON has an uppercase field for example
{
TestField: ""
}
it will generate dart code with
testField

which doesn't match with JSON and throws error while mapping.

[voarlese]

Wish can change On fromJson and ToJson method, like gson
{
"Hello" : "hi" // @SerializedName("Hello") is better
}
class {
String hello;
}

fromJson(Map map) {
hello = map["Hello"];
}