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: 20160220081731_rename_assessment_tags_to_skills.rb
    path of file: ./repos/coursemology2/db/migrate
    
    the code of the file until where you have to start completion: class RenameAssessmentTagsToSkills < ActiveRecord::Migration[4.2]
  def change
    rename_table :course_assessment_tag_groups, :course_assessment_skill_branches
    rename_table :course_assessment_tags, :course_assessment_skills
    rename_table :cour
    
  def change
    rename_table :course_assessment_tag_groups, :course_assessment_skill_branches
    rename_table :course_assessment_tags, :course_assessment_skills
    rename_table :course_assessment_questions_tags, :course_assessment_questions_skills

    rename_column :course_assessment_skills, :tag_group_id, :skill_branch_id
    rename_column :course_assessment_questions_skills, :tag_id, :skill_id
  end