def methods_for_class(classname)
      a = raw_data_relative.first.keys.select{|kl,_| kl == classname}.map{|_,meth| meth}.sort
      a.empty? ? nil : a
    end
def methods_for_class(classname)
      a = raw_data_relative.first.keys.select{|kl,_| kl == classname}.map{|_,meth| meth}.sort
      a.empty? ? nil : a
    end
Methods that were called for the given class. See #analyzed_classes for
 the notation used for singleton classes.
 Returns an array of strings or +nil+