virtual [Metasound::Frontend::FNodeHandle](API\Plugins\MetasoundFrontend\FNodeHandle) CreateFrontendVariableNode ( const [Metasound::Frontend::FGraphHandle](API\Plugins\MetasoundFrontend\FGraphHandle) & InFrontendGraph, const [FGuid](API\Runtime\Core\Misc\FGuid) & InVariableID ) const