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/metadata/MetaDataDictionary.java
StructureDefn type = (StructureDefn) iter.next( );
			type.build( );
		}
	}
	/**
	 * Gets the metadata for a property type.
	 * 
	 * @param type
	 *            numeric type code
	 * @return property type definition
	 */
	public PropertyType getPropertyType( int type )
	{
		assert type >= 0 && type < propertyTypes.length;
		return propertyTypes[type];
	}
    /**
     * Gets a list of rom-defined property types.
     * 
     * @return a list of rom-defined property types.
     */
    
    public List getPropertyTypes()
    {
        return Arrays.asList( propertyTypes );
    }
    
	/**
	 * Gets the metadata for a property type given the type's XML name.
	 *