return "CharMatcher.javaLowerCase()";
    }
  }

  /** Implementation of {@link #javaIsoControl()}. */
  private static final class JavaIsoControl extends NamedFastMatcher {

    static final CharMatcher INSTANCE = new JavaIsoControl();

    private JavaIsoControl() {
      super("CharMatcher.javaIsoControl()");
    }

    @Override
    public boolean matches(char c) {

      return "CharMatcher.javaLowerCase()";
    }
  }

  /** Implementation of {@link #javaIsoControl()}. */
  private static final class JavaIsoControl extends NamedFastMatcher {

    static final CharMatcher INSTANCE = new JavaIsoControl();

    private JavaIsoControl() {
      super("CharMatcher.javaIsoControl()");
    }

    @Override
    public boolean matches(char c) {

  @GwtIncompatible // Character.isISOControl
  public void testJavaIsoControl() {
    for (int c = 0; c <= Character.MAX_VALUE; c++) {
      assertEquals(
          "" + c, Character.isISOControl(c), CharMatcher.javaIsoControl().matches((char) c));
    }
  }

  // Omitting tests for the rest of the JAVA_* constants as these are defined
  // as extremely straightforward pass-throughs to the JDK methods.