module T::Utils

def self.methods_excluding_object(mod)

ancestors) are included.
ancestors, excluding Object and its ancestors. Overrides of methods from Object (and its
Returns the set of all methods (public, protected, private) defined on a module or its 
def self.methods_excluding_object(mod)
  # We can't just do mod.instance_methods - Object.instance_methods, because that would leave out
  # any methods from Object that are overridden in mod.
  mod.ancestors.flat_map do |ancestor|
    # equivalent to checking Object.ancestors.include?(ancestor)
    next [] if Object <= ancestor
    ancestor.instance_methods(false) + ancestor.private_instance_methods(false)
  end.uniq
end