acquireTextBuffer();
		public void perform(ChangeContext context, IProgressMonitor pm) throws JavaModelException, ChangeAbortException {			try{				pm.beginTask("", 10);				super.perform(context, new SubProgressMonitor(pm, 8));				TextBuffer.aboutToChange(fAcquiredTextBuffer);				TextBuffer.save(fAcquiredTextBuffer, new SubProgressMonitor(pm, 2));			} catch (Exception e) {				handleException(context, e);			} finally {				pm.done();			}		}