You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: abstract_recurrence_pattern.rb
    path of file: ./repos/tracks/app/models/recurring_todos
    
    the code of the file until where you have to start completion: module RecurringTodos
  class AbstractRecurrencePattern
    attr_accessor :attributes

    def initialize(user)
      @user = user
    end

    def start_from
      get :start_from
    end

    def end_date
      get :end_date
    end

    def ends_on
      get :ends_on
    e
    
    def get_xth_day_of_month(x, weekday, month, year)
      raise "Weekday should be between 0 and 6 with 0=sunday. You supplied #{weekday}" unless (0..6).cover?(weekday)
      raise "x should be 1-4 for first-fourth or 5 for last. You supplied #{x}" unless (0..5).cover?(x)

      if x == 5
        return find_last_day_x_of_month(weekday, month, year)
      else
        return find_xth_day_of_month(x, weekday, month, year)
      end