code: function (ds) {
              !Dataset && (Dataset = require("./dataset"));
              ds = ds || new Dataset();
              return ds.booleanConstantSql(this.__constant);
          }
docs: @lends patio.sql.BooleanConstant.prototype 
  Converts the {@link patio.sql.BooleanConstant} to a string.
  
  @param {patio.Dataset} [ds] dataset used to created the SQL fragment, if
  the dataset is ommited then the default {@link patio.Dataset} implementation is used.
  
  @return String the SQL version of the {@link patio.sql.BooleanConstant}.