RelationshipConsumer (core 1.3.0-alpha01 API)

All Known Implementing Classes:

HugeGraph.GetTargetConsumer
```
public interface RelationshipConsumer
```
TODO: Define interface contract, esp regarding source/target node ids returned and how that maps to relationship direction consumer interface for relationships without property.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`boolean`	`accept(long sourceNodeId, long targetNodeId)`	Called for every edge that matches a given relation-constraint
`default RelationshipConsumer`	`andThen(RelationshipConsumer after)`

- Method Detail
  - accept
```
boolean accept(long sourceNodeId,
               long targetNodeId)
```
    Called for every edge that matches a given relation-constraint
    
    Parameters:
    
    sourceNodeId - mapped source node id
    
    targetNodeId - mapped target node id
    
    Returns:
    
    true if the iteration shall continue, otherwise false.
  - andThen
```
default RelationshipConsumer andThen(RelationshipConsumer after)
```