Node Connectivity
There are 33 nodes that can be used as predessesor
for a node with an input port of type 
org.uni_leipzig.biggr.ports.FlinkPortObject.
Flink Connector
Provides all required settings to connect to a Flink Cluster.
Subgraph
Extracts a subgraph from a logical graph using the given filter functions.
Transform
Arbitrary transformations of graph elements using user defined functions written in JAVA.