lib/grumlin/expressions/pop.rb in grumlin-0.14.2 vs lib/grumlin/expressions/pop.rb in grumlin-0.14.3

@@ -1,13 +1,15 @@
 # frozen_string_literal: true
 
 module Grumlin
   module Expressions
     module Pop
-      extend Tool
-
       SUPPORTED_STEPS = %i[all first last mixed].freeze
 
-      define_steps(SUPPORTED_STEPS, "Pop")
+      class << self
+        extend Expression
+
+        define_steps(SUPPORTED_STEPS, "Pop")
+      end
     end
   end
 end