IndentExtendtype t = {keywords : (string * Approx_tokens.token) list;lexer : (Lexing.lexbuf -> Approx_tokens.token) option;}val register :
string ->
?keywords:(string * Approx_tokens.token) list ->
?lexer:(Lexing.lexbuf -> Approx_tokens.token) ->
unit ->
unitval find : string -> t