# File lib/aws/emr/instance_group_collection.rb, line 48 def create role, instance_type, instance_count, options = {} options[:instance_role] = role options[:instance_type] = instance_type options[:instance_count] = instance_count options[:bid_price] = options[:bid_price].to_s if options[:bid_price] client_opts = {} client_opts[:job_flow_id] = job_flow.job_flow_id client_opts[:instance_groups] = [options] resp = client.add_instance_groups(client_opts) self[resp.data[:instance_group_ids].first] end