presto-main/src/main/java/io/prestosql/sql/planner/plan/TableScanNode.java/TableScanNode/toString
class TableScanNode:    @Override
    public String toString()
    {
        return toStringHelper(this)
                .add("table", table)
                .add("outputSymbols", outputSymbols)
                .add("assignments", assignments)
                .add("enforcedConstraint", enforcedConstraint)
                .toString();
    }