// resource_pack/items/test.json
{
  "format_version": "1.10",
  "minecraft:item": {
    "description": {
      "identifier": "iter:test",
      "category": "Items"
    },
    "components": {
      "minecraft:icon": "test",
      "minecraft:render_offsets": "apple",
      "minecraft:display_name": {}
    }
  }
}

// resource_pack/entity/test.json
{
  "format_version": "1.10.0",
  "minecraft:client_entity": {
    "description": {
      "identifier": "iter:test",
      "materials": {
        "default": "minecart"
      },
      "textures": {
        "default": "textures/entity/test"
      },
      "geometry": {
        "default": "geometry.test"
      },
      "animations": {
        "move": "animation.test.move"
      },
      "scripts": {
        "animate": [
          "move"
        ]
      },
      "render_controllers": [
        "controller.render.test"
      ]
    }
  }
}

// behaviour_pack/items/test.json
{
  "format_version": "1.10",
  "minecraft:item": {
    "description": {
      "identifier": "iter:test"
    },
    "components": {
      "minecraft:max_stack_size": 1,
      "minecraft:ignores_permission": true,
      "minecraft:entity_placer": {
        "entity": "iter:test"
      }
    }
  }
}

// behaviour_pack/entities/test.json
{
    "format_version": "1.12.0",
    "minecraft:entity": {
        "description": {
            "identifier": "iter:test",
            "is_spawnable": false,
            "is_summonable": true,
            "is_experimental": false
        },
        "components": {
            "minecraft:type_family": {
                "family": [
                    "inanimate"
                ]
            },
            "minecraft:collision_box": {
                "width": 0.98,
                "height": 0.7
            }
        }
    }
}