class ActionView::Resolver

Action View Resolver ↑

def cached(key, prefix, name, partial) 

def cached(key, prefix, name, partial)
  return yield unless key && caching?
  @cached[key][prefix][name][partial] ||= yield
end

def caching? 

def caching?
  @caching ||= !defined?(Rails.application) || Rails.application.config.cache_classes
end

def clear_cache 

def clear_cache
  @cached.clear
end

def find_all(name, prefix=nil, partial=false, details={}, key=nil)

Normalizes the arguments and passes it on to find_template. 
def find_all(name, prefix=nil, partial=false, details={}, key=nil)
  cached(key, prefix, name, partial) do
    find_templates(name, prefix, partial, details)
  end
end

def find_templates(name, prefix, partial, details)

normalized.
because Resolver guarantees that the arguments are present and
This is what child classes implement. No defaults are needed 
def find_templates(name, prefix, partial, details)
  raise NotImplementedError
end

def initialize 

def initialize
  @cached = Hash.new { |h1,k1| h1[k1] =
    Hash.new { |h2,k2| h2[k2] = Hash.new { |h3, k3| h3[k3] = {} } } }
end