connection.save( instance )

Creates or updates an instance using the connection by calling createData or updateData.

// create an instance
const instance = new Type();

// create it with the connection
connection.save( instance ).then( function( instance ) {

    // change the instance
    instance.prop = "NEW VALUE";

    // update it with the connection
    connection.save( instance ).then( function( instance ) {

    } );

} );

The choice of createData or updateData is made by the result of isNew.

Note that can/map adds save to the instance type's prototype.