I tried to run dcop, since my yakuake cannot be shown again in my Cinnamon, and I don't want to restart my yakuake. I found that this command can make my yakuake show again:

dcop yakuake DCOPInterface slotToggleState

But I got no luck running it:

$ dcop

No command 'dcop' found, did you mean:

 Command 'dtop' from package 'diod' (universe)

 Command 'dccp' from package 'dcap' (universe)

 Command 'bcop' from package 'compiz-fusion-bcop' (universe)

dcop: command not found

I've tried to search it, but no luck:

$ apt-cache search dcop

courier-filter-perl - purely Perl-based mail filter framework for the Courier MTA

gambas3 - Complete visual development environment for Gambas

grace - XY graphing and plotting tool

jless - A file pager program, similar to more(1) supporting ISO2022

konversation - user friendly Internet Relay Chat (IRC) client for KDE

xgraph - Plotting program, reads stdin, allows interactive zooming

So, in which package dcop application is contained?