Optional. When it returns false for a level, the library skips that
line before building it, so a disabled level costs nothing, including
the URL redaction every line otherwise goes through. Loggers without it
receive every line and filter it themselves.
Optional. When it returns
falsefor a level, the library skips that line before building it, so a disabled level costs nothing, including the URL redaction every line otherwise goes through. Loggers without it receive every line and filter it themselves.