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: arel_visitors_depth_first.rb
    path of file: ./repos/activerecord-multi-tenant/lib/activerecord-multi-tenant
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

module MultiTenant
  class ArelVisitorsDepthFirst < Arel::Visitors::Visitor
    def initialize(block = nil)
      @block = block || proc
      super()
    end

    private

    def visit(obj, _ = nil)
      super
      @block.call obj
    end

    def unary(obj)
      visit obj.expr
    end
    alias visit_Arel_Nodes_Else              unary
    alias visit_Arel_Nodes_Group             unary
    alias visit_Arel_Nodes_Cube              unary
    alias visit_Arel_Nodes_RollUp            unary
    alias visit_Arel_Nodes_GroupingSet       unary
    alias visit_Arel_Nodes_GroupingElement   unary
    alias visit_Arel_Nodes_Grouping          unary
    alias visit_Arel_Nodes_Having            unary
    alias visit_Arel_Nodes_Lateral           unary
    alias visit_Arel_Nodes_Limit             unary
    alias visit_Arel_Nodes_Not               unary
    alias visit_Arel_Nodes_Offset            unary
    alias visit_Arel_Nodes_On                unary
    alias visit_Arel_Nodes_Orde
    
    def terminal(obj); end
    alias visit_ActiveSupport_Multibyte_Chars terminal
    alias visit_ActiveSupport_StringInquirer  terminal
    alias visit_Arel_Nodes_Lock               terminal
    alias visit_Arel_Nodes_Node               terminal
    alias visit_Arel_Nodes_SqlLiteral         terminal
    alias visit_Arel_Nodes_BindParam          terminal
    alias visit_Arel_Nodes_Window             terminal
    alias visit_Arel_Nodes_True               terminal
    alias visit_Arel_Nodes_False              terminal
    alias visit_BigDecimal                    terminal
    alias visit_Class                         terminal
    alias visit_Date                          terminal
    alias visit_DateTime                      terminal
    alias visit_FalseClass                    terminal
    alias visit_Float                         terminal
    alias visit_Integer                       terminal
    alias visit_NilClass                      terminal
    alias visit_String                        terminal
    alias visit_Symbol                        terminal
    alias visit_Time                          terminal
    alias visit_TrueClass                     terminal

    def visit_Arel_Nodes_InsertStatement(obj)
      visit obj.relation
      visit obj.columns
      visit obj.values
    end

    def visit_Arel_Nodes_SelectCore(obj)
      visit obj.projections
      visit obj.source
      visit obj.wheres
      visit obj.groups
      visit obj.windows
      visit obj.havings
    end

    def visit_Arel_Nodes_SelectStatement(obj)
      visit obj.cores
      visit obj.orders
      visit obj.limit
      visit obj.lock
      visit obj.offset
    end

    def visit_Arel_Nodes_UpdateStatement(obj)
      visit obj.relation
      visit obj.values
      visit obj.wheres
      visit obj.orders
      visit obj.limit
    end

    def visit_Arel_Nodes_Comment(obj)
      visit obj.values
    end

    def visit_Array(obj)
      obj.each { |i| visit i }
    end
    alias visit_Set visit_Array

    def visit_Hash(obj)
      obj.each do |k, v|
        visit(k)
        visit(v)
      end
    end

    DISPATCH = dispatch_cache

    # rubocop:disable Naming/AccessorMethodName
    def get_dispatch_cache
      DISPATCH
    end
    # rubocop:enable Naming/AccessorMethodName
    # rubocop:enable Naming/MethodName
  end