"type" : "custom",
        "tokenizer" : "keyword",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase"]
      },
      "contents_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase", "stopword_en_filter", "pos_filter", "content_length_filter", "limit_token_count_filter"]
      },

            "truncate20_filter",
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_override",
            "arabic_stemmer"
          ]
        },
        "armenian_analyzer": {
          "tokenizer":  "standard",
          "filter": [
            "truncate20_filter",
            "lowercase",
            "armenian_stop",

        "type" : "custom",
        "tokenizer" : "keyword",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase"]
      },
      "contents_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase", "stopword_en_filter", "pos_filter", "content_length_filter", "limit_token_count_filter"]
      },

        "type" : "custom",
        "tokenizer" : "keyword",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase"]
      },
      "contents_analyzer" : {
        "type" : "custom",
        "tokenizer" : "fess_japanese_normal",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase", "stopword_en_filter", "pos_filter", "content_length_filter", "limit_token_count_filter"]
      },

  }

  /**
   * If the argument is a {@linkplain #isLowerCase(char) lowercase ASCII character}, returns the
   * uppercase equivalent. Otherwise returns the argument.
   */
  public static char toUpperCase(char c) {
    return isLowerCase(c) ? (char) (c ^ CASE_MASK) : c;
  }

  /**
   * Indicates whether {@code c} is one of the twenty-six lowercase ASCII alphabetic characters

        "type" : "custom",
        "tokenizer" : "keyword",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase"]
      },
      "contents_analyzer" : {
        "type" : "custom",
        "tokenizer" : "kuromoji_neologd_normal",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase", "stopword_en_filter", "pos_filter", "content_length_filter", "limit_token_count_filter"]
      },

    }

    Alphabet lowerCase() {
      if (!hasUpperCase()) {
        return this;
      }
      checkState(!hasLowerCase(), "Cannot call lowerCase() on a mixed-case alphabet");
      char[] lowerCased = new char[chars.length];
      for (int i = 0; i < chars.length; i++) {
        lowerCased[i] = Ascii.toLowerCase(chars[i]);
      }
      Alphabet lowerCase = new Alphabet(name + ".lowerCase()", lowerCased);

    }

    /**
     * Converts value to lowercase if lowercase wildcard is enabled.
     *
     * @param value the value to convert
     * @return the converted value
     */
    protected String toLowercaseWildcard(final String value) {
        if (lowercaseWildcard) {
            return value.toLowerCase(Locale.ROOT);
        }
        return value;
    }

    /**

  private static final String UPPER = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";

  public void testToLowerCase() {
    assertEquals(LOWER, Ascii.toLowerCase(UPPER));
    assertSame(LOWER, Ascii.toLowerCase(LOWER));
    assertEquals(IGNORED, Ascii.toLowerCase(IGNORED));
    assertEquals("foobar", Ascii.toLowerCase("fOobaR"));
  }

  public void testToUpperCase() {
    assertEquals(UPPER, Ascii.toUpperCase(LOWER));

        }
        encodingMap.put(toLowerCase(source), target);
    }

    /**
     * Converts the given encoding string to lowercase.
     * @param enc The encoding string.
     * @return The lowercase encoding string.
     */
    protected String toLowerCase(final String enc) {
        return enc.toLowerCase(Locale.ROOT);
    }