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: user_yearly_contribution.rb
    path of file: ./repos/open-build-service/src/api/app/services
    
    the code of the file until where you have to start completion: class UserYearlyContribution
  attr_reader :first_day, :user

  def initialize(user, first_day)
    @user = user
 
    
  def reviews_done
    # User.reviews are by_user, we want also by_package and by_group reviews accepted/declined
    ReviewsFinder.new.completed_by_reviewer(user)
                 .where('created_at > ?', first_day)
                 .group('date(created_at)')
                 .count
  end