--- !ruby/object:RI::MethodDescription 
aliases: []

block_params: 
comment: 
- !ruby/struct:SM::Flow::P 
  body: Adds a pre-install hook that will be passed an Gem::Installer instance when Gem::Installer#install is called
full_name: Gem::pre_install
is_singleton: true
name: pre_install
params: (&hook)
visibility: public
