void (List<PyExpression> candidates, PyExpression psi) { if (psi instanceof PyParenthesizedExpression) { addCandidate(candidates, ((PyParenthesizedExpression)psi).getContainedExpression()); } else if (psi instanceof PySequenceExpression) { final PyExpression[] pyExpressions = ((PySequenceExpression)psi).getElements(); for (PyExpression pyExpression : pyExpressions) { addCandidate(candidates, pyExpression); } } else if (psi instanceof PyStarExpression) { final PyExpression expression = ((PyStarExpression)psi).getExpression(); if (expression != null) { addCandidate(candidates, expression); } } else { candidates.add(psi); } }