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
*/
	private void addPropertyType( PropertyType propType )
	{
		int typeCode = propType.getTypeCode( );
		assert propertyTypes[typeCode] == null;
		propertyTypes[typeCode] = propType;
	}
	/**
	 * Returns the meta-data dictionary. This dictionary is shared by all open
	 * designs.
	 * 
	 * @return The meta-data dictionary.
	 */
	public static MetaDataDictionary getInstance( )
	{
		return instance;
	}
	/**
	 * Finds the element definition by its internal name.
	 * 
	 * @param name
	 *            The internal element definition name.
	 * @return The element definition, or null if the name was not found in the
	 *         dictionary.
	 */
	public IElementDefn getElement( String name )
	{
		return (IElementDefn) elementNameMap.get( name );
	}
	/**