public ClassMap find(Class<?> srcClass, Class<?> destClass) {
        return classMappings.get(keyFactory.createKey(srcClass, destClass));
    }
Internal class that determines the appropriate class mapping to be used for
the source and destination object being mapped. Only intended for internal
use.
core/src/main/java/com/github/dozermapper/core/classmap/ClassMappings.java