public Builder readPartitions(final String... readPartitions) {
            return this.readPartitions(Arrays.asList(readPartitions));
        }
Specifies the partition of the graph to read from.  It is possible to assign multiple partition keys so
as to read from multiple partitions at the same time.
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/strategy/decoration/PartitionStrategy.java