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2 - operator's name
3 - custom field's value
Note: custom field's value is not required in case of using operators such as isEmpty or isNotEmpty
4 - case sensitive/insensitive
Note: argument valid for operators = and != for fields: Secure Text, Secure Free Text, Secure List, Secure Multi Select List, Secure Single User Picker, Secure Multi User Picker, Secure Single Group Picker, Secure Multi Group Picker
Operators that are defined for the particular field types are listed below:
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