SalehTZ/json2dartgen

AI Summary: The issue describes a bug where Dart class names generated from JSON keys can start with numbers, resulting in invalid Dart code. The proposed solution is to sanitize these generated class names by either removing the leading digit or prepending a valid character like an underscore, ensuring all class names are valid Dart identifiers.

AI Summary: The issue proposes enhancing the generated `copyWith` method to allow explicitly setting fields to `null`. Currently, passing `null` to a `copyWith` parameter typically means retaining the field's existing value. The solution involves updating the `copyWith` implementation, potentially using optional parameters or a sentinel value, to distinguish between 'not provided' and 'explicitly null', and documenting this behavior.

AI Summary: This GitHub issue addresses the problem of invalid Dart code generation when JSON keys contain characters not allowed in Dart variable or class names. The proposed solution is to implement logic to sanitize these names by replacing or ignoring invalid characters (e.g., converting "user-name" to "userName"), ensuring the generated Dart code is valid and compilable.