Test a group ID for validity.
Valid group IDs consist of one or more dot separated identifiers, where each idenfifiers must contain only ASCII alphanumeric characters or underscores. Each identifier must begin with an alphabetic or underscore character.
See Implementation
Test a group ID for validity.
Valid group IDs consist of one or more dot separated identifiers, where each idenfifiers must contain only ASCII alphanumeric characters or underscores. Each identifier must begin with an alphabetic or underscore character.