parse
Parses a sub-sequence of a log message to extract and return its options. Note that callers cannot rely on this method producing new instances each time it is called as caching of common option values may occur.
Return
the parsed options instance.
Parameters
message
the original log message in which the formatting options have been identified.
pos
the index of the first character to parse.
end
the index after the last character to be parsed.
Throws
if the specified sub-sequence of the string could not be parsed.