Member predicate SingletonMethod::isPrivate

Holds if this method is private. All methods with the name prefix private are private below:

class C
  private_class_method def self.private1
  end

  def self.public
  end

  def self.private2
  end
  private_class_method :private2

  private # this has no effect on singleton methods

  def self.public2
  end
end