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: check_deserialize.rb
    path of file: ./repos/brakeman/lib/brakeman/checks
    
    the code of the file until where you have to start completion: require 'brakeman/checks/base_check'

class Brake
    
  def oj_safe_default?
    safe_default = false

    if tracker.find_call(target: :Oj, method: :mimic_JSON).any?
      safe_default = true
    elsif result = tracker.find_call(target: :Oj, method: :default_options=).first
      options = result[:call].first_arg

      if oj_safe_mode? options
        safe_default = true
      end