"tokenizer" : "pattern_split",
        "char_filter" : ["mapping_char"],
        "filter" : ["lowercase", "content_length_filter"]
      }
    },
    "char_filter" : {
      "zero_width_spaces": {
        "type":       "mapping",
        "mappings": [ "\\u200C=> "]
      },
      "mapping_char" : {
        "type" : "mapping",