code: /*
  HiddenField
  ignoreFormat = (default)null
  ignoreConstructorParameter = (default)false
  ignoreSetter = (default)false
  setterCanReturnItsClass = (default)false
  ignoreAbstractMethods = (default)false
  tokens = PATTERN_VARIABLE_DEF
  
  
  */
  
  //non-compiled with javac: Compilable with Java14
  package com.puppycrawl.tools.checkstyle.checks.coding.hiddenfield;
  
  import java.util.Locale;
  
  public class InputHiddenFieldEnhancedInstanceof {
  
      public class Keyboard {
          private String model = null;
          private final int price = 2;
  
          // Pattern variable price hides field price
          public boolean doStuff(Float f) {
              return f instanceof Float price && // violation
                      price.floatValue() > 0 &&
                      model != null &&
                      price.intValue() == 5;
          }
      }
  
      static final Object OBJ = "";
      static String hiddenStaticField = "hiddenStaticField";
      static {
          // Pattern variable hiddenStaticField hides static field hiddenStaticField
          if (OBJ instanceof String hiddenStaticField) { // violation
              System.out.println(hiddenStaticField
                      .toLowerCase(Locale.forLanguageTag(hiddenStaticField)));
              boolean stringCheck = "test".equals(hiddenStaticField);
          }
      }
  }
  