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
* Enables the validation trigger feature.
	 * 
	 * @param useValidationTrigger
	 *            the flag to set
	 */
	
	public void setUseValidationTrigger( boolean useValidationTrigger )
	{
		this.useValidationTrigger = useValidationTrigger;
	}
	/**
	 * Returns the encryption helper.
	 * 
	 * @return the encryption helper which is registered on metadata dictionary.
	 */
	public IEncryptionHelper getEncryptionHelper( )
	{
		return encryptionHelper;
	}
	/**
	 * Sets the encryption helper.
	 * 
	 * @param encryptionHelper
	 *            the encryption helper to set
	 */
	void setEncryptionHelper( IEncryptionHelper encryptionHelper )
	{
		this.encryptionHelper = encryptionHelper;
	}
}