[fix lint warnings: Uniques pallet] fix clippy::missing_docs_in_private_items warnings (#14591)

* Fix clippy::missing_docs_in_private_items

* Fix clippy::missing_docs_in_private_items

---------

Co-authored-by: parity-processbot <>

substrate/frame/uniques/src/lib.rs

@@ -57,8 +57,10 @@ pub use pallet::*;
 pub use types::*;
 pub use weights::WeightInfo;
 
+/// The log target for this pallet.
 const LOG_TARGET: &str = "runtime::uniques";
 
+/// A type alias for the account ID type used in the dispatchable functions of this pallet.
 type AccountIdLookupOf<T> = <<T as frame_system::Config>::Lookup as StaticLookup>::Source;
 
 #[frame_support::pallet]

substrate/frame/uniques/src/types.rs

@@ -24,12 +24,16 @@ use frame_support::{
 };
 use scale_info::TypeInfo;
 
+/// A type alias for handling balance deposits.
 pub(super) type DepositBalanceOf<T, I = ()> =
 	<<T as Config<I>>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance;
+/// A type alias representing the details of a collection.
 pub(super) type CollectionDetailsFor<T, I> =
 	CollectionDetails<<T as SystemConfig>::AccountId, DepositBalanceOf<T, I>>;
+/// A type alias for the details of a single item.
 pub(super) type ItemDetailsFor<T, I> =
 	ItemDetails<<T as SystemConfig>::AccountId, DepositBalanceOf<T, I>>;
+/// A type alias to represent the price of an item.
 pub(super) type ItemPrice<T, I = ()> =
 	<<T as Config<I>>::Currency as Currency<<T as SystemConfig>::AccountId>>::Balance;