code: package com.puppycrawl.tools.checkstyle.grammar.antlr4;
  
  public class InputAntlr4AstRegressionExpressionList {
          protected InputAntlr4AstRegressionExpressionList ( int i )
      {
          this (); //whitespace
          toString ();
      }
      protected InputAntlr4AstRegressionExpressionList ()
      {
          super ();
      }
  
      public void enhancedFor ()
      {
          int[] i = new int[2];
          for ( int j: i ) {
              System.identityHashCode ( j );
          }
      }
  }
  
  @interface CronExpression {
      Class<?>[] groups() default {};
  }
  
  @interface CronExpression1 {
      Class<?>[] groups() default { }; // extra space
  }
  