# evaluate abstract method

FutureOr<ObjectHolder<T>> evaluate(

1. PodExpressionContext context

)

Evaluate the Pod Expression

Executes this expression within the given PodExpressionContext. The context provides:

- The pod factory, used to construct or retrieve pod instances.
- The scope, determining pod lifecycle and visibility.

The result is an ObjectHolder of type `T`, which safely wraps the resolved pod instance. `ObjectHolder` ensures type consistency and may include metadata such as caching or lifecycle status.

# Return Value

A FutureOr of ObjectHolder<T>:

- May return immediately if resolution is synchronous.
- May return a Future if resolution requires async operations.

# Example

    final expr = SomeConcretePodExpression<int>();
    final context = PodExpressionContext(factory, scope);

    final holder = await expr.evaluate(context);
    print(holder.getPod()); // e.g., 42

# Error Handling

- Throws if the pod cannot be resolved in the given context.
- Subclasses should provide meaningful error messages when evaluation fails.

## Implementation

    FutureOr<ObjectHolder<T>> evaluate(PodExpressionContext context);