isAsync abstract method

Determines whether this method is asynchronous — i.e., declared using the async keyword or returning a Future-like type.

Unlike isFutureVoid, which specifically checks for a Future<void> return type, this method performs a broader inspection to determine whether the method represents any asynchronous computation.

Typical Uses

• Dynamic invocation frameworks: to decide whether to await the result.
• Proxy or interceptor implementations: to preserve correct async semantics.
• Runtime analysis tools: to distinguish between synchronous and asynchronous flows.

Example

class Example {
  Future<void> save() async {}
  Future<int> compute() async => 42;
  void reset() {}
}

final saveMethod = Class(Example).getMethod('save');
final computeMethod = Class(Example).getMethod('compute');
final resetMethod = Class(Example).getMethod('reset');

print(saveMethod.isAsync());   // true
print(computeMethod.isAsync()); // true
print(resetMethod.isAsync());   // false

Return

true if the method is declared as asynchronous (returns a Future or is marked with async), otherwise false.