
Customer
MyCustomer
  pay(amount)

Foo
  (const) WORD
    word
    
  @@foo
  (static) @foo
  @foo
  
  (attr) foo/foo=
  
  initialize(a)
  bar
  self.bar
  fubar
  Foo.fubar
  (...).xxx

  (singleton class) << self
    boz
    self.boz
    
  Foo (in Foo)
    self.foo
    
Foo                              Foo.mega
  self.mega                        Foo.verygood
    Foo
      self.verygood 
    
(::Foo).good

test(x, &block)

Fixnum
  old_plus  =  +
  +(z)
  mega(a,b,c=nil,d=nil,*args,&block)
  
SuperFoo