title: List all methods that an object respond_to?
body: <p>I have two models,</p>
  
  <pre><code>User 
  Membership
  </code></pre>
  
  <p>The two have the following relationship with one another</p>
  
  <pre><code>user has_many :memberships
  </code></pre>
  
  <p>I've been trying to figure out where the build method resides, and how do i get it in a list of methods for the instance. Here is the output of the debugger that shows my delima</p>
  
  <pre><code>(rdb:63) @user.memberships.respond_to?"build"
  true
  </code></pre>
  
  <p>While the following is returning false, shouldnt it return true??</p>
  
  <pre><code>(rdb:63) @user.memberships.instance_methods.include?"build"
  false
  </code></pre>