CustomMetadataV16 typedef

CustomMetadataV16 = CustomMetadataV15

V16 uses the same CustomMetadata structure as V15

Custom metadata fields remain unchanged between V15 and V16.

Reference: https://github.com/paritytech/frame-metadata/blob/main/frame-metadata/src/v16.rs#L47-L66

Implementation

typedef CustomMetadataV16 = CustomMetadataV15;