public static <V extends Vertex, WE extends WeightedEdge<W>, W, G extends Graph<V, WE>> SpanningTreeSourceSelector<V, W, WE, G> minimumSpanningTree( G graph )

UndirectedMutableWeightedGraph<BaseLabeledVertex, BaseLabeledWeightedEdge<Double>, Double> input = ...;
minimumSpanningTree( input )...

Bound mismatch: The generic method minimumSpanningTree(G) of type CommonsGraph<V,E,G> is not applicable for the arguments (UndirectedMutableWeightedGraph<BaseLabeledVertex,BaseLabeledWeightedEdge<Double>,Double>). The inferred type BaseLabeledWeightedEdge<Double> is not a valid substitute for the bounded parameter <WE extends WeightedEdge<W>>

public class Snippet {
	public class WeightedEdge<T> {}
	public class Graph<T> {}
	public <W, WE extends WeightedEdge<W>, G extends Graph<WE>> void minimumSpanningTree( G graph ) {
		return;		
	}	
	public void foo() {
		Graph<WeightedEdge<Double>> input = null;
		minimumSpanningTree( input );
	}
}