code: public org.grails.datastore.mapping.query.api.ProjectionList property(String propertyName, String alias) {
          final PropertyProjection propertyProjection = Projections.property(calculatePropertyName(propertyName));
          addProjectionToList(propertyProjection, alias);
          return this;
      }
docs: A projection that selects a property name
  @param propertyName The name of the property
  @param alias The alias to use