Add a runtime feature flag for prefixing read-time resolver storageKeys

Reviewed By: captbaritone

Differential Revision: D66193115

fbshipit-source-id: 8c4d8c2cff63674443c5b135de3d4b4712c5e7bb

packages/relay-runtime/util/RelayFeatureFlags.js

@@ -54,6 +54,10 @@ export type FeatureFlags = {
 
   // Temporary flag to experiment to enable compatibility with React's unstable <Activity> API
   ENABLE_ACTIVITY_COMPATIBILITY: boolean,
+
+  // Adds a prefix to the storage key of read time resolvers. This is used to
+  // disambiguate the same resolver being used at both read time and exec time.
+  ENABLE_READ_TIME_RESOLVER_STORAGE_KEY_PREFIX: boolean,
 };
 
 const RelayFeatureFlags: FeatureFlags = {
@@ -76,6 +80,7 @@ const RelayFeatureFlags: FeatureFlags = {
   MARK_RESOLVER_VALUES_AS_CLEAN_AFTER_FRAGMENT_REREAD: false,
   ENABLE_CYLE_DETECTION_IN_VARIABLES: false,
   ENABLE_ACTIVITY_COMPATIBILITY: false,
+  ENABLE_READ_TIME_RESOLVER_STORAGE_KEY_PREFIX: true,
 };
 
 module.exports = RelayFeatureFlags;