Squashed 'apollo-ios/' changes from 0a4b36dc1..9e4bad9cc

9e4bad9cc Add RootSelectionSet convenience initializer from inline fragment (#748)

git-subtree-dir: apollo-ios
git-subtree-split: 9e4bad9cc2758ffd8027acf07af247c9fe05848c

Author: gh-action-runner

Sources/ApolloAPI/SelectionSet.swift

@@ -128,8 +128,16 @@ extension SelectionSet where Fragments: FragmentContainer {
   public var fragments: Fragments { Fragments(_dataDict: __data) }
 }
 
+// MARK: - Root Entity Type Conversion Helpers
+
 extension InlineFragment {
   @inlinable public var asRootEntityType: RootEntityType {
     RootEntityType.init(_dataDict: __data)
   }
 }
+
+extension RootSelectionSet {
+  public init<T: InlineFragment>(_ inlineFragment: T) where T.RootEntityType == Self {
+    self = inlineFragment.asRootEntityType
+  }
+}