add comment about injectedVars API

docs/development/core/public/kibana-plugin-public.coresetup.injectedmetadata.md

@@ -8,7 +8,7 @@
 > 
 > 
 
-exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values
+exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values. There is no way to set injected values in the new platform. Use the legacy platform API instead.
 
 <b>Signature:</b>
 

docs/development/core/public/kibana-plugin-public.coresetup.md

@@ -20,7 +20,7 @@ export interface CoreSetup
 |  [context](./kibana-plugin-public.coresetup.context.md) | <code>ContextSetup</code> | [ContextSetup](./kibana-plugin-public.contextsetup.md) |
 |  [fatalErrors](./kibana-plugin-public.coresetup.fatalerrors.md) | <code>FatalErrorsSetup</code> | [FatalErrorsSetup](./kibana-plugin-public.fatalerrorssetup.md) |
 |  [http](./kibana-plugin-public.coresetup.http.md) | <code>HttpSetup</code> | [HttpSetup](./kibana-plugin-public.httpsetup.md) |
-|  [injectedMetadata](./kibana-plugin-public.coresetup.injectedmetadata.md) | <code>{</code><br/><code>        getInjectedVar: (name: string, defaultValue?: any) =&gt; unknown;</code><br/><code>    }</code> | exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values |
+|  [injectedMetadata](./kibana-plugin-public.coresetup.injectedmetadata.md) | <code>{</code><br/><code>        getInjectedVar: (name: string, defaultValue?: any) =&gt; unknown;</code><br/><code>    }</code> | exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values. There is no way to set injected values in the new platform. Use the legacy platform API instead. |
 |  [notifications](./kibana-plugin-public.coresetup.notifications.md) | <code>NotificationsSetup</code> | [NotificationsSetup](./kibana-plugin-public.notificationssetup.md) |
 |  [uiSettings](./kibana-plugin-public.coresetup.uisettings.md) | <code>UiSettingsClientContract</code> | [UiSettingsClient](./kibana-plugin-public.uisettingsclient.md) |
 

docs/development/core/public/kibana-plugin-public.corestart.injectedmetadata.md

@@ -8,7 +8,7 @@
 > 
 > 
 
-exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values
+exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values. There is no way to set injected values in the new platform. Use the legacy platform API instead.
 
 <b>Signature:</b>
 

docs/development/core/public/kibana-plugin-public.corestart.md

@@ -21,7 +21,7 @@ export interface CoreStart
 |  [docLinks](./kibana-plugin-public.corestart.doclinks.md) | <code>DocLinksStart</code> | [DocLinksStart](./kibana-plugin-public.doclinksstart.md) |
 |  [http](./kibana-plugin-public.corestart.http.md) | <code>HttpStart</code> | [HttpStart](./kibana-plugin-public.httpstart.md) |
 |  [i18n](./kibana-plugin-public.corestart.i18n.md) | <code>I18nStart</code> | [I18nStart](./kibana-plugin-public.i18nstart.md) |
-|  [injectedMetadata](./kibana-plugin-public.corestart.injectedmetadata.md) | <code>{</code><br/><code>        getInjectedVar: (name: string, defaultValue?: any) =&gt; unknown;</code><br/><code>    }</code> | exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values |
+|  [injectedMetadata](./kibana-plugin-public.corestart.injectedmetadata.md) | <code>{</code><br/><code>        getInjectedVar: (name: string, defaultValue?: any) =&gt; unknown;</code><br/><code>    }</code> | exposed temporarily until https://github.com/elastic/kibana/issues/41990 done use \*only\* to retrieve config values. There is no way to set injected values in the new platform. Use the legacy platform API instead. |
 |  [notifications](./kibana-plugin-public.corestart.notifications.md) | <code>NotificationsStart</code> | [NotificationsStart](./kibana-plugin-public.notificationsstart.md) |
 |  [overlays](./kibana-plugin-public.corestart.overlays.md) | <code>OverlayStart</code> | [OverlayStart](./kibana-plugin-public.overlaystart.md) |
 |  [savedObjects](./kibana-plugin-public.corestart.savedobjects.md) | <code>SavedObjectsStart</code> | [SavedObjectsStart](./kibana-plugin-public.savedobjectsstart.md) |

src/core/public/application/types.ts

@@ -116,7 +116,8 @@ export interface AppMountContext {
     uiSettings: UiSettingsClientContract;
     /**
      * exposed temporarily until https://github.com/elastic/kibana/issues/41990 done
-     * use *only* to retrieve config values
+     * use *only* to retrieve config values. There is no way to set injected values
+     * in the new platform. Use the legacy platform API instead.
      * @deprecated
      * */
     injectedMetadata: {

src/core/public/index.ts

@@ -147,7 +147,8 @@ export interface CoreSetup {
   uiSettings: UiSettingsClientContract;
   /**
    * exposed temporarily until https://github.com/elastic/kibana/issues/41990 done
-   * use *only* to retrieve config values
+   * use *only* to retrieve config values. There is no way to set injected values
+   * in the new platform. Use the legacy platform API instead.
    * @deprecated
    * */
   injectedMetadata: {
@@ -185,7 +186,8 @@ export interface CoreStart {
   uiSettings: UiSettingsClientContract;
   /**
    * exposed temporarily until https://github.com/elastic/kibana/issues/41990 done
-   * use *only* to retrieve config values
+   * use *only* to retrieve config values. There is no way to set injected values
+   * in the new platform. Use the legacy platform API instead.
    * @deprecated
    * */
   injectedMetadata: {