Add an example with remote methods

misc/formatter/modules/formatter-core/src/test/resources/declarations/service-listener/assert/service_listener_declaration_4.bal

@@ -0,0 +1,35 @@
+import ballerina/grpc;
+
+configurable int port = 9090;
+
+type Book record {
+    string id;
+    string title;
+    string author;
+    float price;
+};
+
+Book[] books = [
+    {id: "1", title: "Book One", author: "Author One", price: 29.99},
+    {id: "2", title: "Book Two", author: "Author Two", price: 19.99},
+    {id: "3", title: "Book Three", author: "Author Three", price: 39.99}
+];
+
+service "Books" on new grpc:Listener(port) {
+    remote function addBook(Book book) returns Book|error {
+        books.push(book);
+        return book;
+    }
+
+    remote function getBook(string id) returns Book|error {
+        Book[] book = books.filter(b => b.id == id);
+        if (book.length() == 0) {
+            return error grpc:NotFoundError(string `Cannot find the album for ID ${id}`);
+        }
+        return book[0];
+    }
+
+    remote function listBooks() returns stream<Book, error?>|error {
+        return books.toStream();
+    }
+}

misc/formatter/modules/formatter-core/src/test/resources/declarations/service-listener/source/service_listener_declaration_4.bal

@@ -0,0 +1,37 @@
+import ballerina/grpc;
+
+
+configurable int port = 9090;
+
+type Book record {
+    string id;
+    string title;
+    string author;
+    float price;
+};
+
+Book[] books = [
+        {id: "1", title: "Book One", author: "Author One", price: 29.99},
+        {id: "2", title: "Book Two", author: "Author Two", price: 19.99},
+        {id: "3", title: "Book Three", author: "Author Three", price: 39.99}
+    ];
+
+service "Books" on new grpc:Listener(port)  {
+    remote function  addBook(Book book) returns Book | error {
+        books.push(book);
+        return book;
+    }
+    remote  function getBook(string id) returns Book | error {
+        Book[] book = books.filter(b => b.id == id);
+        if (book.length() == 0) {
+            return error grpc:NotFoundError(string `Cannot find the album for ID ${id}`);
+        }
+        return book[0];
+    }
+
+
+
+    remote  function listBooks( ) returns  stream<Book, error?> | error {
+        return books.toStream();
+    }
+}