instPreview.getTableViewer().getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
contentProvider = new ActiveInstructionPreviewContentProvider(instPreview.getTableViewer());
instPreview.setContentProvider(contentProvider);
instPreview.getTableViewer().getControl().setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, false));
contentProvider = new ActiveInstructionPreviewContentProvider(instPreview.getTableViewer());
instPreview.setContentProvider(contentProvider);