I'm just exploring ruby and was wondering about the theoretical possibility of adding a method to the class of an object. For example, define a method that takes in a parameter and would add a method to the class of that parameter (not just to the parameter object itself). Something like this example:

class SomeClass
end

class AnotherClass
end

alpha = SomeClass.new
beta = AnotherClass.new

def AddHelloMethodTo param

 # This is where I'm trying to
 # add a method to the class of the parameter
 def param.class.Hello 
  "Hello"
 end

end

AddHelloMethodTo alpha
AddHelloMethodTo beta

gamma = AnotherClass.new

alpha.Hello
beta.Hello
gamma.Hello

(Excuse me if I have syntax errors / typos I'm REALLY new to this!)
Notice how I don't call the AddHelloMethodTo on gamma but I expect Hello to be defined because I added it to the class.
Is this possible?