Trait MapKey
pbcodec::traits
pub trait MapKey: Default + FieldType { }
impl MapKey for Bool
impl MapKey for Int32
impl MapKey for Int64
impl MapKey for Uint32
impl MapKey for Uint64
impl MapKey for Sint32
impl MapKey for Sint64
impl MapKey for Fixed32
impl MapKey for Fixed64
impl MapKey for Sfixed32
impl MapKey for Sfixed64
impl MapKey for Str