I figured out what I want trying to get. I want to get the Producer of an vtkInformation-Object <meta http-equiv="content-type" content="text/html; charset=utf-8">as vtkAlgorithmOutput to connect it to a filter in the constructor of my own filter. PrintKeys of my vtkInformation-Object prints out this:<div>

<br></div><div><div>UPDATE_PIECE_NUMBER: 0</div><div>UPDATE_NUMBER_OF_PIECES: 1</div><div>UPDATE_NUMBER_OF_GHOST_LEVELS: 0</div><div>MAXIMUM_NUMBER_OF_PIECES: -1</div><div>DATA_OBJECT: vtkPolyData(0x626f30)</div><div>WHOLE_BOUNDING_BOX: -0.525 0.475 -0.5 0.5 -0.5 0.5</div>

<div>CONSUMERS: vtkStreamingDemandDrivenPipeline(0x625a90) port 0</div><div>PRODUCER: vtkStreamingDemandDrivenPipeline(0x6243d0) port 0</div><div>UPDATE_EXTENT_INITIALIZED: 0</div></div><div><br></div><div>How can I get the producer efficiently as <meta http-equiv="content-type" content="text/html; charset=utf-8">vtkAlgorithmOutput?</div>