# File lib/yard/options.rb, line 169
    def method_missing(meth, *args, &block)
      if meth.to_s =~ /^(.+)=$/
        log.debug "Attempting to set unregistered key #{$1} on #{self.class}"
        instance_variable_set("@#{$1}", args.first)
      elsif args.size == 0
        log.debug "Attempting to access unregistered key #{meth} on #{self.class}"
        instance_variable_get("@#{meth}")
      else
        super
      end
    end