Bug 315315 Warning messages seen while starting up workbench
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/util/PluginSettings.java
ChartException.PLUGIN,
					"exception.cannot.find.plugin.entry", 
					new Object[]{
							sLookupName, sXsdElementName, sXsdElementValue
					},
					Messages.getResourceBundle( ) );
		}
		final IExtension[] iea = iep.getExtensions( );
		IConfigurationElement[] icea;
		for ( int i = 0; i < iea.length; i++ )
		{
			icea = iea[i].getConfigurationElements( );
			for ( int j = 0; j < icea.length; j++ )
			{
				if ( icea[j].getName( ).equals( sXsdComplexName ) )
				{
					if ( icea[j].getAttribute( sXsdElementName )
							.equals( sLookupName ) )
					{
						return icea[j].getAttribute( sXsdElementValue );
					}
				}
			}
		}
		return null;
	}
	/**
	 * Attempts to walk through the schema tree as defined in an extension point
	 * schema and instantiate the class associated with the value for a given
	 * element name.