anchor.diff:  `split_on_case_change`::
   (Optional, boolean)
   If `true`, the filter splits tokens at letter case transitions. For example:
  -`camelCase` -> [ `camel`, `Case`]. Defaults to `true`.
  +`camelCase` -> [ `camel`, `Case` ]. Defaults to `true`.
   
   `split_on_numerics`::
   (Optional, boolean)
  
positive.code: For example, the following array maps the plus (`+`) and hyphen (`-`) characters
  as alphanumeric, which means they won't be treated as delimiters:
  
  `["+ => ALPHA", "- => ALPHA"]`
  
  Supported types include:
  
  
negative.code:     "analysis": {
        "analyzer": {
          "my_analyzer": {
            "tokenizer": "keyword",
            "filter": [ "my_custom_word_delimiter_graph_filter" ]
          }
        },
  