Merge pull request #5220 from segmentio/niall/concept_model

Add info on new libraries

Author: forstisabella

src/partners/conceptual-model.md

@@ -47,6 +47,9 @@ Plugins are the basis for [Device-mode Destinations](/docs/connections/destinati
 Client SDK Plugins are used to augment Subscriptions and Streams by shipping code to the End User's Device using Segment's SDKs:
 
 - [analytics.js](/docs/connections/sources/catalog/libraries/website/javascript/)
+- [Swift](/docs/connections/sources/catalog/libraries/mobile/apple/destination-plugins/)
+- [Kotlin](/docs/connections/sources/catalog/libraries/mobile/kotlin-android/destination-plugins)
+- [React Native](/docs/connections/sources/catalog/libraries/mobile/react-native/destination-plugins/)
 - [analytics-ios](/docs/connections/sources/catalog/libraries/mobile/ios/#packaging-device-mode-destination-sdks)
 - [analytics-android](/docs/connections/sources/catalog/libraries/mobile/android/#sending-data-to-destinations)
 
@@ -60,7 +63,15 @@ Web plugins are loaded into [analytics.js](/docs/connections/sources/catalog/lib
 
 ### Mobile Plugins
 
-Mobile plugins are loaded into [analytics-ios](/docs/connections/sources/catalog/libraries/mobile/ios/#packaging-device-mode-destination-sdks) or [analytics-android](/docs/connections/sources/catalog/libraries/mobile/android/#sending-data-to-destinations)).
+Mobile plugins are loaded into:
+- [Swift](/docs/connections/sources/catalog/libraries/mobile/apple/destination-plugins/)
+- [Kotlin](/docs/connections/sources/catalog/libraries/mobile/kotlin-android/destination-plugins)
+- [React Native](/docs/connections/sources/catalog/libraries/mobile/react-native/destination-plugins/)
+- [analytics-ios](/docs/connections/sources/catalog/libraries/mobile/ios/#packaging-device-mode-destination-sdks)
+- [analytics-android](/docs/connections/sources/catalog/libraries/mobile/android/#sending-data-to-destinations).
+
+> note ""
+> **Note:** The [Swift](/docs/connections/sources/catalog/libraries/mobile/apple/destination-plugins/), [Kotlin](/docs/connections/sources/catalog/libraries/mobile/kotlin-android/destination-plugins) and [React Native](/docs/connections/sources/catalog/libraries/mobile/react-native/destination-plugins/) libraries were all built with the plugin architecture in mind. This makes adding custom destinations far simpler than the older mobile libraries.  
 
 ## Streams