How to pass custom object between KNIME DataTable


I am new to KNIME and I am developing some plugin for doing spatial operations in KNIME. I did not find any easy application to understand how to pass a custom object between KNIME Plugin. For example one of my plugin should generate a output table of Geometry objects. Which I can use the input port of my another Plugin. I am struggling to understand an easy way to map custom object ( e.g. Geometry) in DataCell.


Also how I can ontain the source code of some existing KNIME node easily. So, I can navigate directly from the node to view its source.

Thank you

Source code:

Example Port Object:

For simple key-value type objects, look at (Geometry sounds as if a key-value map would suffice?)

Otherwise org.knime.base.node.preproc.correlation.pmcc.PMCCPortObjectAndSpec

Hope this helps,