get_proc_address availability from GlfwWindow

[elrnv]

Hello, I'm new here.
I was just wondering if it's intended to get_proc_address from glfw explicitly as in

let mut device = gfx_device_gl::GlDevice::new(|s| window.glfw.get_proc_address(s));

as opposed to the more generic version:

let mut device = gfx_device_gl::GlDevice::new(|s| window.get_proc_address(s));

Thanks!