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See also 
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Developer's Bible, 
Technical Overview
  internal package Foswiki::UI::Save  
UI delegate for save function
 StaticMethod expandAUTOINC($session, $web, $topic) → $topic 
Expand AUTOINC\d+ in the topic name to the next topic name available
 StaticMethod save($session) 
Command handler for 
save command.
This method is designed to be
invoked via the 
UI::run method.
See 
CommandAndCGIScripts for details of parameters.
Note: 
cmd has been deprecated in favour of 
action. It will be deleted at
some point.