Bug 153040 Template definition should be removed after the report item is deleted
Steps to reproduce: 1.New a report, extends lib.label 2.Convert the label to template report item, and revert it back to the report item 3.Delete the label 4.Remove the included library Expected result: Library can be removed Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.v20060808-0630 Error Code:Error.LibraryException.LIBRARY_HAS_DESCENDENTS Error Message:The library "Lib" can no be dropped because it has descendents "NewLabel" in the current module.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/core/UserPropertyDefn.java
assert false;
		}
		return null;
	}
	/**
	 * Gets the definition of the structure which represents the user property
	 * definition.
	 * 
	 * @return structure definition.
	 */
	public IStructureDefn getDefn( )
	{
		return MetaDataDictionary.getInstance( ).getStructure( STRUCTURE_NAME );
	}
	/**
	 * Gets the object definition of the user property definition.
	 * 
	 * @return object definition.
	 * 
	 */
	public IObjectDefn getObjectDefn( )
	{
		return MetaDataDictionary.getInstance( ).getStructure( STRUCTURE_NAME );
	}
	/**
	 * Gets the display name of this user property definition. The search will
	 * check the translation dictionary firstly, then look at the instance
	 * itself. If no display name defined, the XML name will be returned.
	 * 
	 * @return display name of this user property.