private void attachContentProposalProvider() {
Map<String, String> persons = getAttributeMapper().getOptions(getTaskAttribute());
contentProposalProvider = new RedminePersonProposalProvider(getModel().getTask(), getTaskAttribute().getTaskData(), persons);
ILabelProvider labelPropsalProvider = new RedminePersonProposalLabelProvider();
ContentAssistCommandAdapter adapter = new ContentAssistCommandAdapter(text,
new TextContentAdapter(), contentProposalProvider,
ITextEditorActionDefinitionIds.CONTENT_ASSIST_PROPOSALS, new char[0], true);