@Nullable
  MoveMembersProcessor.MoveMembersUsageInfo getUsage(@NotNull PsiMember member,
                                                     @NotNull PsiReference ref,
                                                     @NotNull Set<PsiMember> membersToMove,
                                                     @NotNull PsiClass targetClass);
@Nullable
  MoveMembersProcessor.MoveMembersUsageInfo getUsage(@NotNull PsiMember member,
                                                     @NotNull PsiReference ref,
                                                     @NotNull Set<PsiMember> membersToMove,
                                                     @NotNull PsiClass targetClass)