Phased class abstract interface

Interface for objects that may participate in a phased process such as lifecycle management.

The phase value determines the order in which objects are started and stopped. Lower values have higher priority (start earlier, stop later).

Phase Values

• Negative values: High priority (start first, stop last)
• Zero: Default priority
• Positive values: Low priority (start last, stop first)

Usage Example

class DatabaseConnectionManager implements Phased {
  @override
  int getPhase() => -1000; // Start early, stop late
}

class WebServer implements Phased {
  @override
  int getPhase() => 1000; // Start late, stop early
}