getConversionService abstract method

Retrieves the currently assigned ConversionService.

This method provides access to the type conversion infrastructure for manual conversion operations when dependency injection is not available or suitable.

Usage Contexts:

• Configuration property resolution
• Data binding in web controllers
• Custom deserialization logic
• Format parsing and validation

Example:

class ConfigurationParser {
  final ConversionService conversionService;
  
  ConfigurationParser(this.conversionService);
  
  T parseConfiguration<T>(String key, String value) {
    return conversionService.convert<String, T>(value);
  }
}

// Manual usage
final service = context.getConversionService();
final timeout = service.convert<String, int>("30");
final ratio = service.convert<String, double>("0.85");
final enabled = service.convert<String, bool>("true");
final date = service.convert<String, DateTime>("2023-12-25");

print("Parsed values: $timeout, $ratio, $enabled, $date");