Fixed shared type bytes union members

Author: niloc132

web/client-api/src/main/java/io/deephaven/web/client/api/WorkerConnection.java

@@ -796,10 +796,10 @@ public Promise<SharedExportBytesUnion> shareObject(ServerObject object, SharedEx
     private Ticket sharedTicketFromStringOrBytes(SharedExportBytesUnion sharedTicketBytes) {
         final TypedArray.SetArrayUnionType array;
         if (sharedTicketBytes.isString()) {
-            byte[] arr = sharedTicketBytes.toString().getBytes(StandardCharsets.UTF_8);
+            byte[] arr = sharedTicketBytes.asString().getBytes(StandardCharsets.UTF_8);
             array = TypedArray.SetArrayUnionType.of(arr);
         } else {
-            Uint8Array bytes = (Uint8Array) sharedTicketBytes;
+            Uint8Array bytes = sharedTicketBytes.asUint8Array();
             array = TypedArray.SetArrayUnionType.of(bytes);
         }
         return tickets.sharedTicket(array);

web/client-api/src/main/java/io/deephaven/web/client/ide/SharedExportBytesUnion.java

@@ -4,6 +4,7 @@
 package io.deephaven.web.client.ide;
 
 import com.vertispan.tsdefs.annotations.TsUnion;
+import com.vertispan.tsdefs.annotations.TsUnionMember;
 import elemental2.core.Uint8Array;
 import jsinterop.annotations.JsOverlay;
 import jsinterop.annotations.JsPackage;
@@ -27,4 +28,16 @@ default boolean isString() {
     default boolean isUint8Array() {
         return this instanceof Uint8Array;
     }
+
+    @TsUnionMember
+    @JsOverlay
+    default String asString() {
+        return Js.cast(this);
+    }
+
+    @TsUnionMember
+    @JsOverlay
+    default Uint8Array asUint8Array() {
+        return (Uint8Array) this;
+    }
 }