module Sprockets::SourceMapUtils

def vlq_decode_mappings(str)

Returns an two dimensional Array of Integers.

str - VLQ encoded String

Public: Decode a VLQ string into mapping numbers. 
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