Bug 199834 Enable access to IContent object in IReportItemPresentation layer
In IReportItemPresentation layer, the extended item may want to access properties from current IContent object, for example, bookmark, content style. So we need expose the content object in this layer.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/QueryResultSet.java
}
		/**
		 * Returns the Data Engine data type name of the column at the specified
		 * index.
		 * 
		 * @param index
		 *            The projected column index.
		 * @return The Data Engine data type name of the specified column.
		 * @throws BirtException
		 *             if given index is invalid.
		 */
		public String getColumnTypeName( int index ) throws BirtException
		{
			return null;
		}
		/**
		 * Returns the data provider specific data type name of the specified
		 * column.
		 * 
		 * @return the data type name as defined by the data provider.
		 * @throws BirtException
		 *             if given index is invalid.
		 */
		public String getColumnNativeTypeName( int index ) throws BirtException
		{
			return null;
		}
		/**
		 * Gets the label or display name of the column at the specified index.
		 *