    import ceylon.language.meta.declaration { ClassDeclaration }

    "Returns the class declaration for a given instance. Since only classes
     can be instantiated, this will always be a [[ClassDeclaration]] model.

     Using `declaration` can be more efficient than using [[type]] and
     obtaining the ClassDeclaration from the returned ClassModel."
    since("1.2.0")
    shared native ClassDeclaration classDeclaration(Anything instance);