XXX: Backup v15 show md via metadata_at_version

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>

codegen/Cargo.toml

@@ -14,7 +14,7 @@ description = "Generate an API for interacting with a substrate node from FRAME
 [dependencies]
 codec = { package = "parity-scale-codec", version = "3.0.0", default-features = false, features = ["derive", "full"] }
 darling = "0.14.0"
-frame-metadata = { version = "15.0.0", path = "/home/lexnv/remote-builds/frame-metadata/frame-metadata", features = ["v15", "std"] }
+frame-metadata = { version = "15.0.0", path = "/home/lexnv/remote-builds/frame-metadata/frame-metadata", features = ["v14", "v15-unstable", "std"] }
 heck = "0.4.0"
 proc-macro2 = "1.0.24"
 proc-macro-error = "1.0.4"

codegen/src/api/mod.rs

@@ -29,10 +29,12 @@ use crate::{
 };
 use codec::Decode;
 use frame_metadata::{
-    v15::RuntimeMetadataV15,
+    v15::{
+        RuntimeMetadataV15,
+        TraitMetadata,
+    },
     RuntimeMetadata,
     RuntimeMetadataPrefixed,
-    TraitMetadata,
 };
 use heck::ToSnakeCase as _;
 use proc_macro2::TokenStream as TokenStream2;