String getPattern(
        TextWidth width,
        PluralCategory category,
        IsoUnit unit
    ) {

        checkNull(width, category);
        return this.patterns.get(unit).get(width).get(category);

    }
String getPattern ( TextWidth width , PluralCategory category , IsoUnit unit ) { checkNull ( width , category ) ; return this . patterns . get ( unit ) . get ( width ) . get ( category ) ; }
<p>Yields a unit pattern which optionally contains a placeholder
of the form &quot;{0}&quot; standing for the count of units. </p>

@param   width       text width (ABBREVIATED as synonym for SHORT)
@param   category    plural category
@param   unit        associated iso unit
@return  unit pattern