/**
  * Method called to associate a SchemaProperty object to this object
  * through the SchemaProperty foreign key attribute
  *
  * @param      SchemaProperty $l SchemaProperty
  * @return     void
  * @throws     PropelException
  */
 public function addSchemaPropertyRelatedByIsSubpropertyOf(SchemaProperty $l)
 {
     $this->collSchemaPropertysRelatedByIsSubpropertyOf[] = $l;
     $l->setSchemaPropertyRelatedByIsSubpropertyOf($this);
 }