void (@NotNull PsiIfStatement statement) { super.visitIfStatement(statement); PsiExpression condition = PsiUtil.skipParenthesizedExprDown(statement.getCondition()); if (condition == null) return; PsiReferenceExpression optionalRef = extractOptionalFromPresenceCheck(condition); if (optionalRef == null) return; boolean invert = isEmptyCheck(condition); PsiStatement thenStatement = extractThenStatement(statement, invert); PsiStatement elseStatement = extractElseStatement(statement, invert); check(condition, optionalRef, thenStatement, elseStatement); }