refactor: move more header stuff to elements package

packages/native/src/getNamedContext.tsx

@@ -0,0 +1,21 @@
+import * as React from 'react';
+
+const contexts = new Map<string, React.Context<any>>();
+
+export default function getNamedContext<T>(
+  name: string,
+  initialValue: T
+): React.Context<T> {
+  let context = contexts.get(name);
+
+  if (context) {
+    return context;
+  }
+
+  context = React.createContext<T>(initialValue);
+  context.displayName = name;
+
+  contexts.set(name, context);
+
+  return context;
+}

packages/native/src/index.tsx

@@ -17,4 +17,6 @@ export { default as useLinkBuilder } from './useLinkBuilder';
 
 export { default as ServerContainer } from './ServerContainer';
 
+export { default as getNamedContext } from './getNamedContext';
+
 export * from './types';