2017/06/12 08:57:49 ([]*client.UsageInfo) (len=4 cap=4) {
 (*client.UsageInfo)(0xc4201251c0)({
  ID: (string) (len=64) "fd61df8cfd7c3c236178beda263fe0caa631231ead8883d36c732f75beec8e93",
  Mutable: (bool) false,
  InUse: (bool) false,
  Size: (int64) 4096
 }),
 (*client.UsageInfo)(0xc4201251e0)({
  ID: (string) (len=71) "sha256:4ac76077f2c741c856a2419dfdb0804b18e48d2e1a9ce9c6a3f0605a2078caba",
  Mutable: (bool) false,
  InUse: (bool) true,
  Size: (int64) 383803919
 }),
 (*client.UsageInfo)(0xc420125200)({
  ID: (string) (len=64) "9aa83e93470e637ca3f88cce0448c5fdeb9b5f8741c37a96f4d49ab3d1fdbd5d",
  Mutable: (bool) false,
  InUse: (bool) true,
  Size: (int64) 20480
 }),
 (*client.UsageInfo)(0xc420125240)({
  ID: (string) (len=64) "a9a29e27f3fdd6f02e21438d37d9013199256593dd5bad4a4ecd04a2ca39cef6",
  Mutable: (bool) false,
  InUse: (bool) true,
  Size: (int64) 4100
 })
}