def meta_group_length
      group_length = 0
      meta_elements = group(META_GROUP)
      tag = 4
      vr = 2
      meta_elements.each do |element|
        case element.vr
          when "OB","OW","OF","SQ","UN","UT"
            length = 6
          else
            length = 2
        end
        group_length += tag + vr + length + element.bin.length
      end
      group_length
    end
def meta_group_length
      group_length = 0
      meta_elements = group(META_GROUP)
      tag = 4
      vr = 2
      meta_elements.each do |element|
        case element.vr
          when "OB","OW","OF","SQ","UN","UT"
            length = 6
          else
            length = 2
        end
        group_length += tag + vr + length + element.bin.length
      end
      group_length
    end
Determines the length of the meta group in the DObject instance.

 @return [Integer] the length of the file meta group string