Method seal

flow-rs/src/envelope/envelope.rs:76–78

Convert the `Envelope` to `SealedEnvelope`

(self)

    }
    /// Convert the `Envelope` to `SealedEnvelope`
    pub fn seal(self) -> SealedEnvelope {
        Box::new(self)
    }
    /// Take the message from the envelope
    ///
    /// # Panics