Plumillon

/// TabPanel part 1
/// This is the first part of the TabPanel series:
/// https://medium.com/@FlavienNorindr/building-a-custom-vertical-tabbed-panel-widget-tabpanel-part-1-7fa7a44f6467

import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

Plumillon

import android.content.Context;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.AttributeSet;
import android.view.View;

import java.util.HashMap;
import java.util.Map;

Plumillon

import android.content.Context;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;