Macro frame_support::__impl_outer_config_types

macro_rules! __impl_outer_config_types {
    (
		$concrete:ident $config:ident $snake:ident { $instance:ident } < $ignore:ident >;
		$( $rest:tt )*
	) => { ... };
    (
		$concrete:ident $config:ident $snake:ident < $ignore:ident >;
		$( $rest:tt )*
	) => { ... };
    (
		$concrete:ident $config:ident $snake:ident $( { $instance:ident } )?;
		$( $rest:tt )*
	) => { ... };
    ($concrete:ident) => { ... };
}

Helper macro for impl_outer_config