public GetReservationUtilizationResult withUtilizationsByTime(UtilizationByTime... utilizationsByTime) {
        if (this.utilizationsByTime == null) {
            setUtilizationsByTime(new java.util.ArrayList<UtilizationByTime>(utilizationsByTime.length));
        }
        for (UtilizationByTime ele : utilizationsByTime) {
            this.utilizationsByTime.add(ele);
        }
        return this;
    }
public GetReservationUtilizationResult withUtilizationsByTime ( UtilizationByTime ... utilizationsByTime ) { if ( this . utilizationsByTime == null ) { setUtilizationsByTime ( new java . util . ArrayList < UtilizationByTime > ( utilizationsByTime . length ) ) ; } for ( UtilizationByTime ele : utilizationsByTime ) { this . utilizationsByTime . add ( ele ) ; } return this ; }
<p>
The amount of time that you used your RIs.
</p>
<p>
<b>NOTE:</b> This method appends the values to the existing list (if any). Use
{@link #setUtilizationsByTime(java.util.Collection)} or {@link #withUtilizationsByTime(java.util.Collection)} if
you want to override the existing values.
</p>

@param utilizationsByTime
The amount of time that you used your RIs.
@return Returns a reference to this object so that method calls can be chained together.