private List<MappingFileData> buildGenericMappings(BeanContainer beanContainer, DestBeanCreator destBeanCreator,
                                                       PropertyDescriptorFactory propertyDescriptorFactory) {
        return beanMappingsBuilders.stream()
                .map(m -> m.build(beanContainer, destBeanCreator, propertyDescriptorFactory))
                .collect(ArrayList::new, ArrayList::addAll, ArrayList::addAll);
    }
Creates an instance of {@link Mapper}. Mapper is configured according to the current builder state.
<p>
Subsequent calls of this method will return new instances.

@return new instance of {@link Mapper}.
core/src/main/java/com/github/dozermapper/core/DozerBeanMapperBuilder.java