public Date getDateOrigin() {
    if (!(uu instanceof TimeScaleUnit)) return null;
    TimeScaleUnit tu = (TimeScaleUnit) uu;
    return tu.getOrigin();
  }
public Date getDateOrigin() {
    if (!(uu instanceof TimeScaleUnit)) return null;
    TimeScaleUnit tu = (TimeScaleUnit) uu;
    return tu.getOrigin();
  }
public Date getDateOrigin ( ) { if ( ! ( uu instanceof TimeScaleUnit ) ) return null ; TimeScaleUnit tu = ( TimeScaleUnit ) uu ; return tu . getOrigin ( ) ; }
Get the origin Date.

@return Date or null if not a time unit.
Get the origin Date .