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: test_ast.rb
    path of file: ./repos/jruby/test/mri/ruby
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'test/unit'
require 'tempfile'

class RubyVM
  module AbstractSyntaxTree
    class Node
      class CodePosition
        include Comparable
        attr_reader :lineno, :column
        def initialize(lineno, column)
          @lineno = lineno
          @column = column
        end

        def <=>(other)
          case
          when lineno < other.lineno
            -1
          when lineno == other.lineno
            column <=> other.column
          when lineno > other.lineno
            1
          end
        end
      end

      def beg_pos
        CodePosition.new(first_lineno, first_column)
      end

      def end_pos
        Code
    
  def test_of_proc_and_method
    proc = Proc.new { 1 + 2 }
    method = self.method(__method__)

    node_proc = RubyVM::AbstractSyntaxTree.of(proc)
    node_method = RubyVM::AbstractSyntaxTree.of(method)

    assert_instance_of(RubyVM::AbstractSyntaxTree::Node, node_proc)
    assert_instance_of(RubyVM::AbstractSyntaxTree::Node, node_method)

    Tempfile.create(%w"test_of .rb") do |tmp|
      tmp.print "#{<<-"begin;"}\n#{<<-'end;'}"
      begin;
        SCRIPT_LINES__ = {}
        assert_instance_of(RubyVM::AbstractSyntaxTree::Node, RubyVM::AbstractSyntaxTree.of(proc {|x| x}))
      end;
      tmp.close
      assert_separately(["-", tmp.path], "#{<<~"begin;"}\n#{<<~'end;'}")
      begin;
        load ARGV[0]
        assert_empty(SCRIPT_LINES__)
      end;
    end
  end