default MappingMetadata getMappingMetadata() {
        return MappingMetadata.EMPTY;
    }
The {@link com.github.dozermapper.core.metadata.MappingMetadata} interface can be used to query information about the current
mapping definitions. It provides read only access to all important classes and field
mapping properties. When first called, initializes all mappings if map() has not yet been called.

@return An instance of {@link com.github.dozermapper.core.metadata.MappingMetadata} which serves starting point
for querying mapping information.
core/src/main/java/com/github/dozermapper/core/Mapper.java