add Parameter Impl
Adds the specified parameter to the format instance currently being built. This method is to signify that the parsing of the next parameter is complete.
Note that each successive call to this method during parsing will specify a disjoint ranges of characters from the log message and that each range will be higher that the previously specified one.
Parameters
term Start
the index of the first character in the log message string that was parsed to form the given parameter.
term End
the index after the last character in the log message string that was parsed to form the given parameter.
param
a parameter representing the format specified by the substring of the log message in the range [termStart, termEnd).