Function add_to_reply_keywords 

pub fn add_to_reply_keywords(
    reply: &mut Reply,
    key: &mut Vec<u8>,
    raw_values: &mut Vec<Vec<u8>>,
    has_equal: bool,
) -> Result<(), FromUtf8Error>

Adds a key and its associated values to the keywords field of a Reply struct.

Arguments

• reply - The Reply struct to which the keyword will be added.
• key - The key as a mutable byte vector.
• raw_values - A mutable vector of byte arrays representing the raw values of the keyword.
• has_equal - A boolean indicating whether the keyword had an equal sign (i.e., had a value). If false, the keyword is treated as having a Null value.