logger.go
func (dl *DefaultLogger) Trace(message string, params ...interface{}) {
	dl.logger.Tracef(fmt.Sprintf("%s %s", caller(), message), params...)
}
func (dl *DefaultLogger) Trace(message string, params ...interface{}) {
	dl.logger.Tracef(fmt.Sprintf("%s %s", caller(), message), params...)
}
func ( dl * DefaultLogger ) Trace ( message string , params ... interface { } ) { dl . logger . Tracef ( fmt . Sprintf ( " " , caller ( ) , message ) , params ... ) }
// Trace formats a given message according to given params to log with level Trace.
Trace formats a given message according to given params to log with level Trace .