# File lib/ruote/fei.rb, line 205 def self.extract_h(arg) if arg.is_a?(Hash) return arg if arg['expid'] return arg['fei'] if arg['fei'] end return extract_h(arg.fei) if arg.respond_to?(:fei) return arg.h if arg.is_a?(Ruote::FlowExpressionId) return arg.h['fei'] if arg.is_a?(Ruote::Workitem) if arg.is_a?(String) ss = arg.split('!') return { 'engine_id' => ss[-4] || 'engine', 'expid' => ss[-3], 'subid' => ss[-2], 'wfid' => ss[-1] } end raise ArgumentError.new( "couldn't extract fei out of instance of #{arg.class}") end