Introduced ExampleVariable_UnmarshalJSON to demonstrate unmarshaling of JSON with nil and non-nil fields. This includes handling for multiple custom types and provides a sample output. Added necessary imports and error handling for clarity.
Enhanced the test coverage by adding nil checks for ByteSlice and Float32 types after reset. This ensures that more types are adequately handled and validated for nil values in the tests. Additionally, included a check for the string using the Get method.
Enhanced the niljson package to include support for byte slices and float32 types. Updated the test cases to validate these new types and modified method names to be more consistent.