[Dovecot] how to display dovecot.index.cache

hello dovecot@dovecot.org:

I want to see the contents of dovecot.index.cache .  Is there any command can make it become visible character displayed ?

the command idxview can displayed doveoct.index and logview can dispalyed dovecot.index.log but it seems no command to displays dovecot.index.cache for us.

                    thanks  
                           amandy