src/Queries/BaseQuery.php
protected function propsMustBeSelected()
    {
        return in_array('PROPS', $this->select)
            || in_array('PROPERTIES', $this->select)
            || in_array('PROPERTY_VALUES', $this->select);
    }
protected function propsMustBeSelected()
    {
        return in_array('PROPS', $this->select)
            || in_array('PROPERTIES', $this->select)
            || in_array('PROPERTY_VALUES', $this->select);
    }
Determine if all fields must be selected.

@return bool