public static Sample ofTimeText(long time, String textValue) {
        return new Sample(time, null, null, textValue);
    }
public static Sample ofTimeText ( long time , String textValue ) { return new Sample ( time , null , null , textValue ) ; }
Creates a new {@link Sample} with time and text value specified

@param  time         time in milliseconds from 1970-01-01 00:00:00
@param  textValue    the text value of the sample
@return the Sample with specified fields