JMap.Query.groupExist
Returns true if group exists, else false, for the given group id.
The JMap query group id
if group id is not correct (invalid format or no resource exists)
// returns true if group existsJMap.Query.groupExist(21) Copy
// returns true if group existsJMap.Query.groupExist(21)
JMap.Query.groupExist
Returns true if group exists, else false, for the given group id.