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• convertFromObject()
  Converts from dataprovider value to db value

• convertToObject()
  Converts from db value to dataprovider value

• getToObjectType(one of  IColumnTypes constants: TEXT, INTEGER, NUMBER, DATETIME or MEDIA)
  The dataprovider data type (so the resulting type of the convertToObject())., being one of the IColumnTypes constants: TEXT, INTEGER, NUMBER, DATETIME or MEDIA

A column converter class can define properties in the getDefaultProperties() method, which will be displayed in the Conversion tab as well.

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