public function hasReferrer(ForeignKey $fk)
    {
        return $this->hasReferrers() && in_array($fk, $this->referrers, true);
    }
public function hasReferrer(ForeignKey $fk)
    {
        return $this->hasReferrers() && in_array($fk, $this->referrers, true);
    }
public function hasReferrer ( ForeignKey $ fk ) { return $ this -> hasReferrers ( ) && in_array ( $ fk , $ this -> referrers , true ) ; }
Returns whether or not this column has a specific referrer for a
specific foreign key object.

@param  ForeignKey $fk
@return boolean
Returns whether or not this column has a specific referrer for a specific foreign key object .