SyncPreferredLocationsRetriever (Flink : Runtime 2.0.0 API)

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.
```
@FunctionalInterface
public interface SyncPreferredLocationsRetriever
```
Component to retrieve the preferred locations of an execution vertex.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Collection<TaskManagerLocation>`	`getPreferredLocations(ExecutionVertexID executionVertexId, Set<ExecutionVertexID> producersToIgnore)`	Returns preferred locations of an execution vertex.

- Method Detail
  - getPreferredLocations
```
Collection<TaskManagerLocation> getPreferredLocations(ExecutionVertexID executionVertexId,
                                                      Set<ExecutionVertexID> producersToIgnore)
```
    Returns preferred locations of an execution vertex.
    
    Parameters:
    
    executionVertexId - id of the execution vertex
    
    producersToIgnore - producer vertices to ignore when calculating input locations
    
    Returns:
    
    future of preferred locations