private void internalInsert(AttributeSet attributes, int c, int r)
    {
        cellAttributes.put((long) c, (long) r, attributes);
    }
private void internalInsert ( AttributeSet attributes , int c , int r ) { cellAttributes . put ( ( long ) c , ( long ) r , attributes ) ; }
Inserts a set of attributes into the grid at the specified location. This is a private insert method, that does
not notify model listeners, so that the public insert methods can do that as a separate step.

@param attributes The attribute set to insert.
@param c          The column position.
@param r          The row position.