private static String message(Class<?> clazz) {
        return "Class '" + clazz + "' can't be injected.";
    }
An exception that is thrown if a particular class can't be used as an 
injectable parameter.

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