def vlq_decode_mappings(str)
      mappings = []

      str.split(';').each_with_index do |group, index|
        mappings[index] = []
        group.split(',').each do |segment|
          mappings[index] << vlq_decode(segment)
        end
      end

      mappings
    end
def vlq_decode_mappings(str)
      mappings = []

      str.split(';').each_with_index do |group, index|
        mappings[index] = []
        group.split(',').each do |segment|
          mappings[index] << vlq_decode(segment)
        end
      end

      mappings
    end
Public: Decode a VLQ string into mapping numbers.

 str - VLQ encoded String

 Returns an two dimensional Array of Integers.