in hugegraph-client/src/main/java/org/apache/hugegraph/serializer/direct/struct/HugeType.java [122:128]
public boolean isIndex() {
return this == VERTEX_LABEL_INDEX || this == EDGE_LABEL_INDEX ||
this == SECONDARY_INDEX || this == SEARCH_INDEX ||
this == RANGE_INT_INDEX || this == RANGE_FLOAT_INDEX ||
this == RANGE_LONG_INDEX || this == RANGE_DOUBLE_INDEX ||
this == SHARD_INDEX || this == UNIQUE_INDEX;
}