presto-main/src/main/java/io/prestosql/memory/MemoryPoolAssignmentsRequest.java/MemoryPoolAssignmentsRequest/MemoryPoolAssignmentsRequest
class MemoryPoolAssignmentsRequest:    @JsonCreator
    public MemoryPoolAssignmentsRequest(@JsonProperty("coordinatorId") String coordinatorId, @JsonProperty("version") long version, @JsonProperty("assignments") List<MemoryPoolAssignment> assignments)
    {
        this.coordinatorId = requireNonNull(coordinatorId, "coordinatorId is null");
        this.version = version;
        this.assignments = ImmutableList.copyOf(requireNonNull(assignments, "assignments is null"));
    }