Can't find java file for ImmutableCsvProjectTableScanRule

[xiaobo]

Hi,

we are trying to make our adapter projectable now,  but we can't find the Java 
file for the ImmutableCsvProjectTableScanRule class in the CSV example, can you 
help with this.


/** Rule configuration. */
  @Value.Immutable(singleton = false)
  public interface Config extends RelRule.Config {
    Config DEFAULT = 
ImmutableCsvProjectTableScanRule.Config.builder()
        .withOperandSupplier(b0 ->
            
b0.operand(LogicalProject.class).oneInput(b1 ->
               
 b1.operand(CsvTableScan.class).noInputs()))
        .build();

    @Override default CsvProjectTableScanRule toRule() {
      return new CsvProjectTableScanRule(this);
    }
  }