leftComposite.setLayout( new GridLayout() );
TableWrapData leftCompositeTableWrapData = new TableWrapData( TableWrapData.FILL, TableWrapData.TOP );
leftCompositeTableWrapData.grabHorizontal = true;
leftComposite.setLayoutData( leftCompositeTableWrapData );
Composite rightComposite = toolkit.createComposite( parent );
rightComposite.setLayout( new GridLayout() );
TableWrapData rightCompositeTableWrapData = new TableWrapData( TableWrapData.FILL, TableWrapData.TOP );
rightCompositeTableWrapData.grabHorizontal = true;
rightComposite.setLayoutData( rightCompositeTableWrapData );