List<PsiVariable> (@NotNull ControlFlow flow, int start, int end) { List<PsiVariable> usedVariables = getUsedVariables(flow, start, end); List<PsiVariable> array = new ArrayList<>(usedVariables.size()); for (PsiVariable variable : usedVariables) { if (needVariableValueAt(variable, flow, start)) { array.add(variable); } } return array; }