body.setLayout(new FillLayout());
MDSashForm sashForm = new MDSashForm(body, SWT.HORIZONTAL, managedForm);
sashForm.setSashWidth(6);
tk.adapt(sashForm, false, false);
sashForm.hookResizeListener();
Composite leftPanel = tk.createComposite(sashForm);
gd = new GridData(SWT.FILL, SWT.FILL, true, true);
leftPanel.setLayoutData(gd);