usebitflags::bitflags;bitflags!{/// Flags associated with a `Msg` indicating its role or attributes.
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]pubstructMsgFlags: u8 {/// More message parts follow this one.
const MORE = 0b01;
/// Internal: Indicates a ZMTP command frame.
const COMMAND = 0b10;
// Add other flags later if needed
}}