ImmutableList<ImplementationSnapshot> currentAdditionalImplementations = Cast.uncheckedNonnullCast(thisExecution.getAdditionalImplementations());
        ChangeContainer implementationChanges = new ImplementationChanges(
            previousImplementation, lastExecution.getAdditionalImplementations(),
            currentImplementation, currentAdditionalImplementations,
            executable);

        validateImplementation(workValidationContext, beforeExecutionState.getImplementation(), "Implementation of ", work);
        beforeExecutionState.getAdditionalImplementations()
            .forEach(additionalImplementation -> validateImplementation(workValidationContext, additionalImplementation, "Additional action of ", work));