Function proj_sys::proj_context_set_network_callbacks

pub unsafe extern "C" fn proj_context_set_network_callbacks(
    ctx: *mut PJ_CONTEXT,
    open_cbk: proj_network_open_cbk_type,
    close_cbk: proj_network_close_cbk_type,
    get_header_value_cbk: proj_network_get_header_value_cbk_type,
    read_range_cbk: proj_network_read_range_type,
    user_data: *mut c_void
) -> c_int