String () { if (element instanceof PsiExpression expression) { final PsiType type = expression.isValid() ? expression.getType() : null; if (type == null) return null; return JavaBundle.message("type.migration.cannot.convert.tooltip", type.getCanonicalText(), pair.getSecond().getCanonicalText()); } else { return JavaBundle.message("type.migration.cannot.convert.vararg.tooltip"); } }