Ghi chú (Comment) trong Dart

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/*
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/// Documentation comment (for dartdoc)
/// Supports **Markdown**

/// Calculates the sum of two numbers.
/// 
/// Returns the sum of [a] and [b].
/// 
/// Example:
/// ```dart
/// var result = add(2, 3); // 5
/// ```
int add(int a, int b) => a + b;
 
/// A user in the system.
/// 
/// Use [User.fromJson] to create from JSON.
class User {
  /// The user's display name.
  final String name;
  
  /// Creates a new user with [name].
  User(this.name);
}

// TODO: Implement error handling
// FIXME: Memory leak issue
// HACK: Temporary workaround