Pantheon\Terminus\Models\TerminusModel::has PHP Method

Checks whether the model has an attribute

public has ( string $attribute ) : boolean
$attribute	string	Name of the attribute key
return	boolean	True if attribute exists, false otherwise

    public function has($attribute)
    {
        $isset = isset($this->attributes->{$attribute});
        return $isset;
    }

TerminusModel