Remove decl>vertex map, as it caused errors.

 */

public class CallGraph extends DirectedPseudograph<CallGraph.Vertex, CallGraph.Edge<?>> implements Buildable<NodeList<CompilationUnit>> {

    private final Map<CallableDeclaration<?>, CFG> cfgMap;

    private final Map<CallableDeclaration<?>, Vertex> vertexDeclarationMap = ASTUtils.newIdentityHashMap();

    private final ClassGraph classGraph;

    private boolean built = false;

        arg.accept(new VoidVisitorAdapter<Void>() {

            @Override

            public void visit(MethodDeclaration n, Void arg) {

                addDeclaration(n);

                addVertex(new Vertex(n));

                super.visit(n, arg);

            }

            @Override

            public void visit(ConstructorDeclaration n, Void arg) {

                addDeclaration(n);

                addVertex(new Vertex(n));

                super.visit(n, arg);

            }

        }, null);

    }

    protected void addDeclaration(CallableDeclaration<?> n) {

        Vertex v = new Vertex(n);

        vertexDeclarationMap.put(n, v);

        addVertex(v);

    }

    protected boolean addEdge(CallableDeclaration<?> source, CallableDeclaration<?> target, Resolvable<? extends ResolvedMethodLikeDeclaration> call) {

        Edge<?> edge = new Edge<>(call, findGraphNode(call, source));

        return addEdge(vertexDeclarationMap.get(source), vertexDeclarationMap.get(target), edge);

        return addEdge(findVertexByDeclaration(source), findVertexByDeclaration(target), edge);

    }

    /** Find the calls to methods and constructors (edges) in the given list of compilation units. */