Contributing configuration of type "array" in VSCode extension

Question

I'm creating extension to VSCode that needs to be configured with array of objects containing fields: a and b. Using information available in extensions docs () it's unclear to me, if I can define configuration schema of array's elements, if I set property type to "array". I tried to put following code in "configuration" contribution, but no success (I can retrieve successfully configuration in code, but there is no IDE hints when user fills in data):

"title": "My config",
"properties": {
  "array_property": {
    "title": "Property",
    "type": "array",
    "properties": {
      "a": {
        "type": "string",
        "description": "A a"
      },
      "b": {
        "type": "string",
        "description": "A b"
      }
    }
  }
}

I tried replacing "type": "array" with "type": ["array", "object"], but it did not change anything.

Answer 1

With a sample configuration like this

"configuration": {
    "type": "object",
    "title": "Test configuration",
    "properties": {
        "mytest.objarrconf": {
            "type": "array",
            "items": {
                "type": "object",
                "title": "inner objects",
                "properties": {
                    "name": {
                        "type": "string",
                        "description": "Name of inner object"
                    },
                    "size": {
                        "type": "number",
                        "description": "Size of inner object"
                    }
                }
            },
            "default": [],
            "description": "my test configurations"
        }
    }
}

it will result in this