code: public void addSizeExpression( Expression sizeExpression )
    {
      if( _sizeExpressions == null )
      {
        _sizeExpressions = new ArrayList<Expression>( 2 );
      }
      _sizeExpressions.add( sizeExpression );
    }
docs: The size expression for the new array operation.
  <p/>
  The properties: Constructor, ValueExpressions, and SizeExpression are
  mutually exclusive.