Provides a standardized way to signal that a specific method or operation is not supported in the current class or context.

This trait is useful for abstract base classes, partial implementations, or stubs, where certain methods should intentionally throw an exception when invoked.

Features:

• Throws a consistent UnsupportedOperationException when calling the unsupported() method.
• Allows optional method name labeling for clarity in the exception message.

Dependencies:

• oihana\enums\Char for optional formatting (e.g., empty string).
• oihana\exceptions\UnsupportedOperationException to indicate the operation is disallowed.

Example usage:

use oihana\traits\UnsupportedTrait;

class ReadOnlyRepository {
    use UnsupportedTrait;

    public function save($item) {
        $this->unsupported(__FUNCTION__); // Will throw exception
    }
}