WRAPPER_API bool get_IsSignatureValidCustom() const
The get_IsSignatureValidCustom method indicates if the custom datasource file has been manually edited (i.e. with Notepad) since the last time it was saved. The custom datasource is written out with a calculated signature value based on the current contents at the time it is saved. If the file is edited prior to being loaded, the signature saved in the file will not match the signature calculated from the (edited) contents of the file. This method will return true if the calculated signature matches the signature from the file, and false otherwise.