Add generic accessors for Core-related API

sources/ClientRealm/ClientGlobal.uc

@@ -29,6 +29,11 @@ var public ClientUnrealAPI unreal;
 
 var private LoggerAPI.Definition fatBadAdapterClass, errNoInteraction;
 
+public function UnrealAPI unreal_api()
+{
+    return unreal;
+}
+
 public final static function ClientGlobal GetInstance()
 {
     if (default.myself == none)

sources/CoreRealm/CoreGlobal.uc

@@ -2,7 +2,7 @@
  *  Base class for objects that will provide an access to a Acedia's client- and
  *  server-specific functionality by giving a reference to this object to all
  *  Acedia's objects and actors, emulating a global API namespace.
- *      Copyright 2022 Anton Tarasenko
+ *      Copyright 2022-2023 Anton Tarasenko
  *------------------------------------------------------------------------------
  * This file is part of Acedia.
  *
@@ -29,6 +29,30 @@ var public TimeAPI          time;
 
 var private LoggerAPI.Definition fatNoAdapterClass;
 
+/**
+ *  Accessor to the generic `UnrealAPI`.
+ */
+public function UnrealAPI unreal_api()
+{
+    return none;
+}
+
+public final static function CoreGlobal GetGenericInstance()
+{
+    local ServerGlobal serverAPI;
+    local ClientGlobal clientAPI;
+
+    serverAPI = class'ServerGlobal'.static.GetInstance();
+    if (serverAPI != none && serverAPI.IsAvailable()) {
+        return serverAPI;
+    }
+    clientAPI = class'ClientGlobal'.static.GetInstance();
+    if (clientAPI != none && clientAPI.IsAvailable()) {
+        return clientAPI;
+    }
+    return none;
+}
+
 /**
  *  This method must perform initialization of the caller `...Global` instance.
  *

sources/ServerRealm/ServerGlobal.uc

@@ -2,7 +2,7 @@
  *  Class for an object that will provide an access to a Acedia's
  *  server-specific functionality by giving a reference to this object to all
  *  Acedia's objects and actors, emulating a global API namespace.
- *      Copyright 2022 Anton Tarasenko
+ *      Copyright 2022-2023 Anton Tarasenko
  *------------------------------------------------------------------------------
  * This file is part of Acedia.
  *
@@ -30,6 +30,11 @@ var public ServerUnrealAPI  unreal;
 
 var private LoggerAPI.Definition fatBadAdapterClass;
 
+public function UnrealAPI unreal_api()
+{
+    return unreal;
+}
+
 public final static function ServerGlobal GetInstance()
 {
     if (default.myself == none)