void ToNukeGeometryConverter::registerConverter( IECore::TypeId fromType, CreatorFn creator )
{
	TypesToFnsMap *m = typesToFns();
	m->insert( TypesToFnsMap::value_type( Types( fromType ), creator ) );
}
void ToMayaObjectConverter::registerConverter( IECore::TypeId fromType, const MFn::Type resultType, CreatorFn creator )
{
	TypesToFnsMap *m = typesToFns();
	m->insert( TypesToFnsMap::value_type( Types( fromType, resultType ), creator ) );
	m->insert( TypesToFnsMap::value_type( Types( fromType, MFn::kInvalid ), creator ) ); // for the create function which doesn't care about resultType
}