lib/plumb/build.rb in plumb-0.0.3 vs lib/plumb/build.rb in plumb-0.0.4

@@ -1,17 +1,18 @@
 # frozen_string_literal: true
 
-require 'plumb/steppable'
+require 'plumb/composable'
 
 module Plumb
   class Build
-    include Steppable
+    include Composable
 
-    attr_reader :type
+    attr_reader :children
 
     def initialize(type, factory_method: :new, &block)
       @type = type
       @block = block || ->(value) { type.send(factory_method, value) }
+      @children = [type].freeze
       freeze
     end
 
     def call(result) = result.valid(@block.call(result.value))