Hygiene Problem in pvq-program-metadata-gen

[indirection42]

Since the metadata generation code is derived from the original PVQ program code, the package imports below may conflict with the original source code.

fn import_packages() -> proc_macro2::TokenStream {
    quote! {
        extern crate alloc;
        use std::path::Path;
        use serde::Serialize;
        use parity_scale_codec::Encode;
        use scale_info::{
            form::{Form, MetaForm, PortableForm},
            prelude::vec::Vec,
            IntoPortable, PortableRegistry, Registry,
        };
    }
}