message: Add some notes about RuleGroupTypeIC
diff: @@ -9,14 +9,16 @@ import TypeScriptAdmonition from './_ts_admonition.md';
  The default export of `react-querybuilder` is the `<QueryBuilder />` React component.
  -## Props
  +All props are optional, but as stated in the [getting started guide](../intro), the query builder is really only useful when, at a minimum, the `fields` prop is defined.
  :::note
  -All props are optional, but as stated in the [getting started guide](../intro), the query builder is really only useful when, at a minimum, the `fields` prop is defined.
  +When you see `RuleGroupTypeAny` below (e.g. for [query](#query), [defaultQuery](#defaultquery), and [onQueryChange](#onquerychange)), that means the type must either be `RuleGroupType` or `RuleGroupTypeIC`. However, if the type is `RuleGroupTypeIC`, then the [`independentCombinators` prop](#independentcombinators) must be set to `true`. Likewise, if the type is `RuleGroupType` then `independentCombinators` must be `false` or `undefined`.
  :::
  +## Props
  +
  ### `fields`
  `Field[] | OptionGroup<Field>[]`
  