Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
for ( Iterator itor = getDataSetList( handle.getContainer( ) )
					.iterator( ); itor.hasNext( ); )
			{
				DesignElementHandle dataSet = (DesignElementHandle) itor.next( );
				if ( !dataSetList.contains( dataSet ) )
				{
					dataSetList.add( dataSet );
				}
			}
		}
		return dataSetList;
	}
	/**
	 * Get definition of model property.
	 * 
	 * @param elementName
	 * @param propertyName
	 */
	public static IElementPropertyDefn getPropertyDefn( String elementName,
			String propertyName )
	{
		IElementDefn elementDefn = DesignEngine.getMetaDataDictionary( )
				.getElement( elementName );
		if ( elementDefn != null )
		{
			return elementDefn.getProperty( propertyName );
		}
		return null;
	}
	/**