# File lib/fog/aws/requests/kinesis/split_shard.rb, line 32
        def split_shard(options={})
          stream_name = options.delete("StreamName")
          shard_id = options.delete("ShardToSplit")
          stream = data[:kinesis_streams].detect{ |s| s["StreamName"] == stream_name }

          unless stream = data[:kinesis_streams].detect{ |s| s["StreamName"] == stream_name }
            raise Fog::AWS::Kinesis::ResourceNotFound.new("Stream #{stream_name} under account #{@account_id} not found.")
          end

          unless shard = stream["Shards"].detect{ |shard| shard["ShardId"] == shard_id }
            raise Fog::AWS::Kinesis::ResourceNotFound.new("Could not find shard #{shard_id} in stream #{stream_name} under account #{@account_id}.")
          end

          # Close original shard (set an EndingSequenceNumber on it)
          shard["SequenceNumberRange"]["EndingSequenceNumber"] = next_sequence_number

          # Calculate new shard ranges
          parent_starting_hash_key = shard["HashKeyRange"]["StartingHashKey"]
          parent_ending_hash_key = shard["HashKeyRange"]["EndingHashKey"]
          new_starting_hash_key = options.delete("NewStartingHashKey")

          # Create two new shards using contiguous hash space based on the original shard
          stream["Shards"] << {
            "HashKeyRange"=> {
              "EndingHashKey" => (new_starting_hash_key.to_i - 1).to_s,
              "StartingHashKey" => parent_starting_hash_key
            },
            "SequenceNumberRange" => {
              "StartingSequenceNumber" => next_sequence_number
            },
            "ShardId" => next_shard_id,
            "ParentShardId" => shard_id
          }
          stream["Shards"] << {
            "HashKeyRange" => {
              "EndingHashKey" => parent_ending_hash_key,
              "StartingHashKey" => new_starting_hash_key
            },
            "SequenceNumberRange" =>{
              "StartingSequenceNumber" => next_sequence_number
            },
            "ShardId" => next_shard_id,
            "ParentShardId" => shard_id
          }

          response = Excon::Response.new
          response.status = 200
          response.body = ""
          response
        end