You have the following application helper

module ApplicationHelper
  def method_a

Then if you have other helper
module OtherHelper
  def b
   method_a # i can call method a here

I am not sure how this actually works since module has not inheritance. So 
my question is if I didn't extend the applicationhelper module, but create a 
new module for it, let's say UserHelper. Then in any other helper module, i 
need to include this UserHelper module if the helper module needs to use 
some of the codes in it. Hope i get myself clear.

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