add TryProxy for any objects

src/SMAPI/Framework/ModHelpers/ModRegistryHelper.cs

@@ -98,5 +98,31 @@ namespace StardewModdingAPI.Framework.ModHelpers
                 return castApi;
             return this.ProxyFactory.CreateProxy<TInterface>(api, this.ModID, uniqueID);
         }
+
+        /// <inheritdoc />
+        public bool TryProxy<TInterface>(string uniqueID, object toProxy, out TInterface proxy) where TInterface : class
+        {
+            try
+            {
+                foreach (var toProxyInterface in toProxy.GetType().GetInterfaces())
+                {
+                    var unproxyBuilder = this.ProxyFactory.ObtainBuilder(typeof(TInterface), toProxyInterface, this.ModID, uniqueID);
+                    if (unproxyBuilder.TryUnproxy(toProxy, out object targetInstance))
+                    {
+                        proxy = (TInterface)targetInstance;
+                        return true;
+                    }
+                }
+
+                var proxyBuilder = this.ProxyFactory.ObtainBuilder(toProxy.GetType(), typeof(TInterface), this.ModID, uniqueID);
+                proxy = (TInterface)proxyBuilder.ObtainInstance(toProxy, this.ProxyFactory);
+                return true;
+            }
+            catch
+            {
+                proxy = null;
+                return false;
+            }
+        }
     }
 }

src/SMAPI/IModRegistry.cs

@@ -25,5 +25,12 @@ namespace StardewModdingAPI
         /// <typeparam name="TInterface">The interface which matches the properties and methods you intend to access.</typeparam>
         /// <param name="uniqueID">The mod's unique ID.</param>
         TInterface GetApi<TInterface>(string uniqueID) where TInterface : class;
+
+        /// <summary>Try to proxy (or unproxy back) the given object to a given interface provided by a mod.</summary>
+        /// <typeparam name="TInterface">The interface type to proxy (or unproxy) to.</typeparam>
+        /// <param name="uniqueID">The mod's unique ID.</param>
+        /// <param name="toProxy">The object to try to proxy (or unproxy back).</param>
+        /// <param name="proxy">The reference to store the proxied (or unproxied) object back.</param>
+        bool TryProxy<TInterface>(string uniqueID, object toProxy, out TInterface proxy) where TInterface : class;
     }
 }