public function isStorable()
    {
        return
            ! $this->isReadOnly() &&
            ! $this->isHidden() &&
            $this->getFieldRelation() == Field::NORMAL &&
            $this->isStorable;
    }
public function isStorable()
    {
        return
            ! $this->isReadOnly() &&
            ! $this->isHidden() &&
            $this->getFieldRelation() == Field::NORMAL &&
            $this->isStorable;
    }
public function isStorable ( ) { return ! $ this -> isReadOnly ( ) && ! $ this -> isHidden ( ) && $ this -> getFieldRelation ( ) == Field :: NORMAL && $ this -> isStorable ; }
Is the field storable to the current table.

1.  Is not read only.
2. Is not hidden field (Clarify: This is not equals to HTML's hidden, it's hide() ).
3. Is no special relation.
@return bool
Is the field storable to the current table .