in earlier days i overwrote like this:
class A
  def self.foo
    puts 'Foo'
  end
end

class B
  def self.foo
    puts 'Foo'
    puts 'Bar'
  end
end




i renamed as you told me:
class A

def w_meth(params)
   puts "original"
end

def o_meth(org, params)
   self.send org.to_sym, params
   puts "w"

end
end


x = A.new
x.w_meth("o_meth", "some")  --> ERROR