presto-spi/src/main/java/io/prestosql/spi/expression/FieldDereference.java/FieldDereference/equals
class FieldDereference:    @Override
    public boolean equals(Object o)
    {
        if (this == o) {
            return true;
        }
        if (o == null || getClass() != o.getClass()) {
            return false;
        }

        FieldDereference that = (FieldDereference) o;
        return Objects.equals(target, that.target)
                && Objects.equals(field, that.field)
                && Objects.equals(getType(), that.getType());
    }