public Optional<MapperInstance> getDeserializer( JType type ) {
        return Optional.fromNullable( deserializers.get( type.getQualifiedSourceName() ) );
    }
public Optional < MapperInstance > getDeserializer ( JType type ) { return Optional . fromNullable ( deserializers . get ( type . getQualifiedSourceName ( ) ) ) ; }
Return a {@link MapperInstance} instantiating the deserializer for the given type

@param type a {@link com.google.gwt.core.ext.typeinfo.JType} object.
@return a {@link com.google.gwt.thirdparty.guava.common.base.Optional} object.