Monobehavior for use with Svelto ECS and Odin Inspectors to explore entity data.

EntitiesViewer.cs

using System;
using System.Collections;
using System.Collections.Generic;
using Sirenix.OdinInspector;
using Svelto.ECS;
using Svelto.ECS.Example.Survive;
using Svelto.ECS.Internal;
using UnityEngine;

public class EntitiesViewer : MonoBehaviour
{
    private MainContext _context;
    private Dictionary<int, Dictionary<Type, ITypeSafeDictionary>> _db;

    void Start ()
	{
	    _context = GetComponent<MainContext>();
	    _db = _context._applicationRoot._enginesRoot._groupEntityDB;
    }

    [ShowInInspector]
    public Dictionary<int, Dictionary<int, List<IEntityStruct>>> Data = new Dictionary<int, Dictionary<int, List<IEntityStruct>>>();

	void Update ()
	{
	    foreach (var group in _db)
	    {
	        var gid = group.Key;
	        var entityTypeContainers = group.Value;

	        var groupDictionary = new Dictionary<int, List<IEntityStruct>>();
	        Data[gid] = groupDictionary;

            foreach (var entity in entityTypeContainers)
	        {
	            var components = entity.Value.GetEntityStructs();

	            foreach (var component in components)
	            {
	                if (!groupDictionary.ContainsKey(component.Key))
	                {
	                    groupDictionary[component.Key] = new List<IEntityStruct>();
                    }
                    groupDictionary[component.Key].Add(component.Value);
                }
            }
	    }
    }
}

Requires Changes to TypeSafeDictionary.cs

ITypeSafeDictionary

 IEnumerable<KeyValuePair<int, IEntityStruct>> GetEntityStructs();

TypeSafeDictionary

        public IEnumerable<KeyValuePair<int, IEntityStruct>> GetEntityStructs()
        {
            return this.AsEnumerable().Select(o => new KeyValuePair<int, IEntityStruct>(o.Key, o.Value));
        }