presto-memory/src/main/java/io/prestosql/plugin/memory/MemoryMetadata.java/MemoryMetadata/MemoryMetadata
class MemoryMetadata:    @Inject
    public MemoryMetadata(NodeManager nodeManager)
    {
        this.nodeManager = requireNonNull(nodeManager, "nodeManager is null");
        this.schemas.add(SCHEMA_NAME);
    }