protected static Definition findUnambiguousDeclaration(Token t) {
if (t == null) return null;
List<Definition> defs = t.resolveBinding();
if (defs.size() <= 0 || defs.size() > 1) return null;
return defs.get(0);
}
protected static boolean isUniquelyDefinedIdentifer(Token t) {
return isBoundIdentifier(t) && t.resolveBinding().size() == 1;
}
protected static boolean isBoundIdentifier(Token t) {
return isIdentifier(t) && !t.resolveBinding().isEmpty();
}