@Override
            public <T> T apply(Class<T> type) {
                return findIn(
                    type, 
                    injector, 
                    instances,
                    true // Required = true
                );
            }
Default implementation of the {@link InjectorBuilder}-interface.

@author Emil Forslund
@since  1.2.0
common-parent/injector/src/main/java/com/speedment/common/injector/internal/InjectorBuilderImpl.java