/*namespace-body:
         | '{' optional-using-directive optional-namespace-member-declaration '}' */
        private void namespace_body(ref CompilationUnitNode compilation, ref NamespaceNode currentNamespace)
        {
            printIfDebug("namespace_body");
            if (!pass(TokenType.PUNT_CURLY_BRACKET_OPEN))
            {
                throwError("'{' expected");
            }
            consumeToken();

            if (pass(TokenType.RW_USING))
            {
                var usingDirectives = optional_using_directive();
                currentNamespace.setUsings(usingDirectives);
            }
            if (pass(namespaceOption, encapsulationOptions, typesDeclarationOptions))
            {
                optional_namespace_or_type_member_declaration(ref compilation, ref currentNamespace);
            }
            else
            {
                //EPSILON
            }
            if (!pass(TokenType.PUNT_CURLY_BRACKET_CLOSE))
            {
                throwError("'}' expected");
            }
            consumeToken();
        }