Macro delim_boundary 

macro_rules! delim_boundary {
    ($delim:expr) => { ... };
}

Create a new boundary based on a delimiter.

let conv = Converter::new()
    .set_boundaries(&[delim_boundary!("::")])
    .to_case(Case::Camel);

assert_eq!(
    conv.convert("my::var::name"),
    "myVarName",
)