# File lib/AWS/EC2/instances.rb, line 223
223:       def unmonitor_instances( options = {} )
224:         options = { :instance_id => [] }.merge(options)
225:         raise ArgumentError, "No :instance_id provided" if options[:instance_id].nil? || options[:instance_id].empty?
226:         params = pathlist("InstanceId", options[:instance_id])
227:         return response_generator(:action => "UnmonitorInstances", :params => params)
228:       end