# MissingRequiredEnvironmentException constructor

MissingRequiredEnvironmentException(

1. String message, {
2. Object? cause,

})

Exception thrown when a required environment variable is not found.

This is typically used in systems where environment variables are mandatory and their absence should fail-fast during startup or runtime.

You can optionally attach a `cause` for additional context.

### 📦 Example Usage:

    final env = Environment.SYSTEM;
    try {
      final token = env.get('API_TOKEN');
    } on MissingRequiredEnvironmentException catch (e) {
      print('Missing variable: ${e.message}');
    }

Used internally by `SystemEnvironment.get` in the JetLeaf framework.

Creates a new MissingRequiredEnvironmentException with the given `message` and an optional `cause`.

## Implementation

    MissingRequiredEnvironmentException(super.message, {super.cause});