pub fn to_payload_type_string(&self) -> String {
        self.payload
            .iter()
            .map(AsRef::as_ref)
            .collect::<Vec<&str>>()
            .join(",")
    }
/// Converts to a string representing the type (or types) contained in the payload
Converts to a string representing the type (or types) contained in the payload
Converts to a string representing the type ( or types ) contained in the payload
pub fn to_payload_type_string(&self) -> String {
        self.payload
            .iter()
            .map(AsRef::as_ref)
            .collect::<Vec<&str>>()
            .join(",")
    }
pub fn to_payload_type_string ( & self ) -> String { self . payload . iter ( ) . map ( AsRef :: as_ref ) . collect :: < Vec < & str > > ( ) . join ( " " ) }
Converts to a string representing the type (or types) contained in the payload
Converts to a string representing the type ( or types ) contained in the payload
&self