function calcStats() {
  return {
    maxIdLength: Math.max(...Object.keys(loggers).map((l) => l.length))
  };
}
function calcStats() {
  return {
    maxIdLength: Math.max(...Object.keys(loggers).map((l) => l.length))
  };
}
function calcStats ( ) { return { maxIdLength : Math . max ( ... Object . keys ( loggers ) . map ( ( l ) => l . length ) ) } ; }
Prepare stats. Currently only maxIdLength supported in core, can be extended
in custom plugin.

@return {{maxIdLength: number}}
Prepare stats . Currently only maxIdLength supported in core can be extended in custom plugin .