Remove observer as an observer on this object so that it will no longer receive notifications.
observer
An observer of this Observable
Dispatch enter and leave events for AlternationPatternNode nodes and continue walking the tree.
in foo | bar
Add the –clear-sources option
Add the –key option
Add the –otp option
Default options for the gem install and update commands.
Add the –http-proxy option
Add the –source option
Add the –platform option to the option parser.
Starts tracing object allocations.
Stop tracing object allocations.
Note that if ::trace_object_allocations_start is called n-times, then tracing will stop after calling ::trace_object_allocations_stop n-times.
Clear recorded tracing information.
Parse and return an int from string