boolean (GrExpression expression) { final PsiElement inner = PsiUtil.skipParentheses(expression, false); if (inner == null) return false; @NonNls final String text = inner.getText(); return "1".equals(text) || "0x1".equals(text) || "0X1".equals(text) || "1.0".equals(text) || "1L".equals(text) || "1l".equals(text) || "0b0".equals(text) || "0B0".equals(text); }