if ( manifest == null ) throw new IllegalArgumentException( "The extension with ID '" + extensionID + "' is not found!" );
	public static ExtensionManifest getDataSourceExtension( String extensionID )	{		ExtensionManifest manifest = null;		try		{			manifest = DtpManifestExplorer.getInstance( ).getExtensionManifest(					extensionID );		}		catch ( Exception e )		{			// Do nothing.		}		if ( manifest == null )			throw new IllegalArgumentException(					"The extension with ID '" + extensionID + "' is not found!" ); //$NON-NLS-1$ //$NON-NLS-2$		return manifest;	}