Function highlight_method_call_by_name_ref 

fn highlight_method_call_by_name_ref(
    sema: &Semantics<'_, RootDatabase>,
    krate: Option<Crate>,
    name_ref: &NameRef,
    is_unsafe_node: &impl Fn(AstPtr<Either<Expr, Pat>>) -> bool,
) -> Option<Highlight>