public Builder poolSize(int poolSize) {
            this.poolSize = poolSize;
            return this;
        }
The size of the {@code GryoPool}. The size can not be changed once created.

@param poolSize the pool size
@return the updated builder
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/structure/io/gryo/GryoPool.java