final ObjectVector visibleFields = internalContext.getVisibleFields();
        for (int i = visibleFields.size(); i-- > 0;) {
            final FieldBinding b = (FieldBinding) visibleFields.elementAt(i);
            final String key = String.valueOf(b.computeUniqueKey());
            final IJavaElement field = JavaCore.create(key);
            if (field instanceof IField) {
                entrypoints.add(new CallChainEdge(field, EdgeType.FIELD));
            }
        }

import org.eclipse.jdt.internal.core.util.Util;
[...]

 final Util.BindingsToNodesMap EmptyNodeMap = new Util.BindingsToNodesMap() {
            @Override
            public ASTNode get(final Binding binding) {
                return null;
            }
        };
 // compiler bindings obtained from corecontext.getAccessibleFields/methods/locaVariables
final Binding b = (Binding) elements.elementAt(i);
IJavaElement unresolvedJavaElement = null;
EdgeType edgeType = null;
if (b instanceof FieldBinding) {
    unresolvedJavaElement = Util.getUnresolvedJavaElement((FieldBinding) b, null, EmptyNodeMap);
} else if (b instanceof MethodBinding) {
    final MethodBinding methodBinding = (MethodBinding) b;
    unresolvedJavaElement = Util.getUnresolvedJavaElement(methodBinding, null, EmptyNodeMap);
}} else if (b instanceof VariableBinding) {
    // a local variable
    final VariableBinding varBinding = (VariableBinding) b;
    final String varName = new String(varBinding.name);
    final String varType = new String(varBinding.type.signature());
    final JavaElement varParent = (JavaElement) corecontext.getEnclosingElement();
    unresolvedJavaElement = new LocalVariable(varParent, varName, 0, 0, 0, 0, varType, null,
            varBinding.modifiers, varBinding.isParameter());

if (unresolvedJavaElement !=null) {
    entrypoints.add(new CallChainEdge(unresolvedJavaElement));
}