presto-main/src/main/java/io/prestosql/sql/planner/optimizations/joins/JoinGraph.java/JoinGraph/withFilter
class JoinGraph:    public JoinGraph withFilter(Expression expression)
    {
        ImmutableList.Builder<Expression> filters = ImmutableList.builder();
        filters.addAll(this.filters);
        filters.add(expression);

        return new JoinGraph(nodes, edges, rootId, filters.build(), containsCrossJoin);
    }