Macro frame_support::impl_outer_event

macro_rules! impl_outer_event {
    (
		$(#[$attr:meta])*
		pub enum $name:ident for $runtime:ident {
			$( $rest_events:tt )*
		}
	) => { ... };
    (
		$(#[$attr:meta])*;
		$name:ident;
		$runtime:ident;
		Modules {
			$( #[codec(index = $index:tt)] )? $module:ident $instance:ident<T>,
			$( $rest_event_generic_instance:tt )*
		};
		{ $( $parsed:tt )* };
	) => { ... };
    (
		$(#[$attr:meta])*;
		$name:ident;
		$runtime:ident;
		Modules {
			$( #[codec(index = $index:tt)] )? $module:ident $instance:ident,
			$( $rest_event_instance:tt )*
		};
		{ $( $parsed:tt )* };
	) => { ... };
    (
		$(#[$attr:meta])*;
		$name:ident;
		$runtime:ident;
		Modules {
			$( #[codec(index = $index:tt)] )? $module:ident<T>,
			$( $rest_event_generic:tt )*
		};
		{ $( $parsed:tt )* };
	) => { ... };
    (
		$(#[$attr:meta])*;
		$name:ident;
		$runtime:ident;
		Modules {
			$( #[codec(index = $index:tt)] )? $module:ident,
			$( $rest_event_no_generic_no_instance:tt )*
		};
		{ $( $parsed:tt )* };
	) => { ... };
    (
		$(#[$attr:meta])*;
		$name:ident;
		$runtime:ident;
		Modules {};
		{
			$(
				$module_name:ident::Event
				$( <$generic_param:ident> )?
				$( { $generic_instance:ident } )?
				index { $( $index:tt )? },
			)*
		};
	) => { ... };
}

Constructs an Event type for a runtime. This is usually called automatically by the construct_runtime macro.