Stub over existing role so examples can compile

Author: coke

doc/Type/Distribution/Hash.pod6

@@ -4,6 +4,7 @@
 
 =SUBTITLE Distribution::Hash
 
+=for code :preamble<role Distribution::Locally {}>
     class Distribution::Hash does Distribution::Locally { }
 
 A L<Distribution|/type/Distribution> implementation backed by the filesystem. It

doc/Type/Distribution/Path.pod6

@@ -4,6 +4,7 @@
 
 =SUBTITLE Distribution::Path
 
+=for code :preamble<role Distribution::Locally {}>
     class Distribution::Path does Distribution::Locally { }
 
 A L<Distribution|/type/Distribution> implementation backed by the filesystem. It requires a

doc/Type/IO/Socket/INET.pod6

@@ -4,7 +4,7 @@
 
 =SUBTITLE TCP Socket
 
-=for code
+=for code :preamble<role IO::Socket {}>
 class IO::Socket::INET does IO::Socket {}
 
 C<IO::Socket::INET> provides TCP sockets, both the server and the client side.
@@ -106,4 +106,4 @@ Once a new connection is established, an C<IO::Socket::INET>
 instance (or a subclass instance) for consuming
 the connection is returned.
 
-=end pod
+=end pod