double getMass( double secs, double fLength ) const override { return t_.getMass( secs, fLength ); }
double getMass( double secs, int mode ) const override { return t_.getMass( secs, mode ); }
double getMass( double secs, double fLength ) const override { return t_.getMass( secs, fLength ); }
double getMass( double secs, int mode ) const override { return t_.getMass( secs, mode ); }