Add getObjects from model request (#1634)

Co-authored-by: Alex Ma <alma1@microsoft.com>

src/Microsoft.SqlTools.ServiceLayer/DacFx/Contracts/GetObjectsFromTSqlModelRequest.cs

@@ -0,0 +1,33 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.DacFx.Contracts
+{
+    /// <summary>
+    /// Parameters to get objects from SQL model
+    /// </summary>
+    public class GetObjectsFromTSqlModelParams
+    {
+        /// <summary>
+        /// URI of the project file this model is for
+        /// </summary>
+        public string ProjectUri { get; set; }
+
+        /// <summary>
+        /// Object types to query
+        /// </summary>
+        public string[] ObjectTypes { get; set; }
+    }
+
+    /// <summary>
+    /// Defines the get objects sql model request
+    /// </summary>
+    class GetObjectsFromTSqlModelRequest
+    {
+        public static readonly RequestType<GetObjectsFromTSqlModelParams, TSqlObjectInfo[]> Type =
+            RequestType<GetObjectsFromTSqlModelParams, TSqlObjectInfo[]>.Create("dacFx/getObjectsFromTSqlModel");
+    }
+}