public FieldMap build(ClassMap classMap, BeanContainer beanContainer, DestBeanCreator destBeanCreator, PropertyDescriptorFactory propertyDescriptorFactory) {
        DozerField aField = a.convert();
        DozerField bField = b.convert();

        FieldMap fieldMap = new ExcludeFieldMap(classMap, beanContainer, destBeanCreator, propertyDescriptorFactory);
        fieldMap.setSrcField(aField);
        fieldMap.setDestField(bField);
        if (type != null) {
            fieldMap.setType(MappingDirection.valueOf(type.value()));
        }

        return fieldMap;
    }
Exclude a particular field from being mapped
core/src/main/java/com/github/dozermapper/core/builder/model/jaxb/FieldExcludeDefinition.java