ruby.rb

module MyPatch
  def find(name, prefixes = [], partial = false, keys = [], options = {})
    raise "MyPatch_find"
  end
end

ActionView::LookupContext::ViewPaths.prepend MyPatch

ActionView::LookupContext::ViewPaths.ancestors
# => [MyPatch, ActionView::LookupContext::ViewPaths]

self.class
# => ActionView::LookupContext

self.find("foo")
# => DOES NOT RAISE "MyPatch_find"