public IGraphQlBuilder AddSchema(string name, Action <SchemaConfiguration> configure)
        {
            if (name == null)
            {
                throw new ArgumentNullException(nameof(name));
            }

            var schema = new SchemaConfiguration(name);

            configure(schema);

            services.AddSingleton <ISchemaProvider>(schema);
            return(this);
        }
 internal IGraphQlBuilder AddSchema(SchemaConfiguration schema)
 {
     services.AddSingleton <ISchemaProvider>(schema);
     return(this);
 }