Function with_kinds 

fn with_kinds(
    line: &str,
    kinds: &[String],
    first: bool,
    version4: bool,
) -> String

The line with more kinds in its TYPE and, when asked, marked as the one to use first; its value as it was. Kinds are written in the case its TYPE uses, else upper case in vCard 3.0 and lower case in 4.0.