const [TArray](API\Runtime\Core\Containers\TArray)< [FRigVMExternalVariable](API\Plugins\RigVM\RigVMCore\FRigVMExternalVariable) > GetExternalVariables ( const [FRigVMExtendedExecuteContext](API\Plugins\RigVM\RigVMCore\FRigVMExtendedExecuteContext) & Context ) const