public Builder initializeMapper(final Consumer<GryoMapper.Builder> gryoMapperConsumer) {
            this.gryoMapperConsumer = gryoMapperConsumer;
            return this;
        }
A consumer to update the {@code GryoMapper.Builder} once constructed.

@param gryoMapperConsumer the {@code GryoMapper.Builder} consumer
@return the updated builder
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoPool.java