pub const VLS: &str = "sphinx";
pub const VLS_RETURN: &str = "sphinx-return";
pub const CONTROL: &str = "sphinx-control";
pub const CONTROL_RETURN: &str = "sphinx-control-return";
pub const PROXY: &str = "sphinx-proxy";
pub const PROXY_RETURN: &str = "sphinx-proxy-return";
pub const ERROR: &str = "sphinx-error";