code: /*
  ParenPad
  option = (default)nospace
  tokens = LITERAL_SYNCHRONIZED, CTOR_DEF, CTOR_CALL, LITERAL_IF
  
  
  */
  
  package com.puppycrawl.tools.checkstyle.checks.whitespace.parenpad;
  
  class InputParenPadForSynchronized {
  
      private static InputParenPadForSynchronized instance = null;
      private InputParenPadForSynchronized() {
      }
  
      public synchronized static InputParenPadForSynchronized getInstance() {
          if(instance == null ) { // violation
              instance = new InputParenPadForSynchronized();
          }
          return instance;
      }
  }
  