@Override
    public Function<T, A> firstStep() {
        @SuppressWarnings("unchecked")
        final Function<T, A> function = (Function<T, A>) firstStep;
        return function;
    }
Default implementation of the {@link ComposedPredicate}

@author Emil Forslund
@since  3.1.2
runtime-parent/runtime-field/src/main/java/com/speedment/runtime/field/internal/predicate/ComposedPredicateImpl.java