Handle model notes in SBGN-ML
SBGN-ML can contain model notes (see attached file). Please handle this information on import/export. [Apoptosis_03.06.2020.xml.sbgn](/uploads/66a0a786b9c12f31f5e5d97ffb2306f0/Apoptosis_03.06.2020.xml.sbgn)
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