Derive Macro SlintElement

#[derive(SlintElement)]
{
    // Attributes available to this derive:
    #[rtti_field]
}

This derive macro is used with structures in the run-time library that are meant to be exposed to the language. The structure is introspected for properties and fields marked with the rtti_field attribute and generates run-time type information for use with the interpreter. In addition all Property<T> foo fields get a convenient getter function generated that works on a Pin<&Self> receiver.