ProcessGraph processes the SubGraph instance accumulating result for the query from different instances.

ToJson converts the list of subgraph into a JSON response by calling ToFastJSON.

ToProtocolBuf returns the list of protos.Node which would be returned to the go client.

ToSubGraph converts the GraphQuery into the internal SubGraph instance type.

Codec implements the custom codec interface.

Latency is used to keep track of the latency involved in parsing and processing the query.

SubGraph is the way to represent data internally.