code: public static <T> IRelationalJMapper<T> getRelationalMapper(final Class<T> configuredClass, JMapperAPI jmapperAPI){
  		return getRelationalMapper(configuredClass, jmapperAPI.toXStream().toString());
  	}
docs: Returns an instance of JMapper from cache if exists, in alternative a new instance.
  <br>Takes in input the configured Class and the configuration in API format.
  @param configuredClass configured class
  @param jmapperAPI the configuration
  @param <T> Mapped class type
  @return the mapper instance