test/trace_processor/heap_graph.textproto

packet {
  process_tree {
    processes {
      pid: 1
      ppid: 0
      cmdline: "init"
    }
    processes {
      pid: 2
      ppid: 1
      cmdline: "system_server"
    }
  }
}
packet {
  trusted_packet_sequence_id: 999
  timestamp: 10
  heap_graph {
    objects {
      id: 0x01
      type_id: 1
      self_size: 64
      reference_field_id: 1
      reference_object_id: 2
    }
    objects {
      id: 0x02
      type_id: 2
      self_size: 32
    }
    continued: true
    index: 1
  }
  heap_graph {
    type_names {
      iid: 1
      str: "FactoryProducerDelegateImplActor"
    }
    type_names {
      iid: 2
      str: "Foo"
    }
    field_names {
      iid: 1
      str: "FactoryProducerDelegateImplActor.foo"
    }
    continued: false
    index: 2
  }
}