code: private function addBooleanColumnFalse(array $columnValues): array
      {
          foreach ($this->getBooleanColumnNames() as $booleanColumnName) {
              if (!isset($columnValues[$booleanColumnName])) {
                  $columnValues[$booleanColumnName] = Postgres::BOOLEAN_FALSE;
              }
          }
  
          return $columnValues;
      }
docs: inserts columnName => 'f' into columnValues array for any boolean column in the table that does not exist in columnValues