@startuml

set namespaceSeparator \\

namespace Entity {
    class Artist {}
}

namespace Html {
    namespace Form {
        class ArtistForm {
            + __construct(artist : ?Artist := null)
            + getArtist() : ?Artist
            + getHtmlForm(action : string) : string
            + setEntityFromQueryString(): void
        }
    }
    interface StringEscaper << $trait >> {
        + escapeString(text : ?string) : string
        + stripTagsAndTrim(text : ?string) : string
    }
}

Entity\\Artist <-o  "0..1\nartist" Html\\Form\\ArtistForm

Html\\StringEscaper <|.. Html\\Form\\ArtistForm  : << use >>

note left of Html\\Form\\ArtistForm::setEntityFromQueryString
throws <font:monospaced><b>ParameterException
when artist name is missing
in the query string
end note
@enduml