@Override
    public Features getFeatures() {
        return new Features() {
            @Override
            public boolean requiresLocalMessageScopes() {
                return true;
            }

            @Override
            public boolean requiresVertexPropertyAddition() {
                return true;
            }
        };
    }
Identifies "Connected Component" instances in a graph by assigning a component identifier (the lexicographically
least string value of the vertex in the component) to each vertex.

@author Stephen Mallette (http://stephen.genoprime.com)
@author Daniel Kuppitz (http://gremlin.guru)
gremlin-core/src/main/java/org/apache/tinkerpop/gremlin/process/computer/clustering/connected/ConnectedComponentVertexProgram.java