public void accept(@NotNull PsiElementVisitor visitor) {
   if (visitor instanceof CSharpVisitor) ((CSharpVisitor) visitor).visitReturnType(this);
   else super.accept(visitor);
 }
 public void accept(@NotNull PsiElementVisitor visitor) {
   if (visitor instanceof CSharpVisitor) ((CSharpVisitor) visitor).visitRankSpecifiers(this);
   else super.accept(visitor);
 }
 public void accept(@NotNull PsiElementVisitor visitor) {
   if (visitor instanceof CSharpVisitor) ((CSharpVisitor) visitor).visitFixedParameter(this);
   else super.accept(visitor);
 }