OPAL case-sensitive filtering with contains

OPAL filters are case-insensitive by default. Case-sensitive filtering is used when the filter verb is combined with the contains function.

Given the following string:

log: 2024-04-06T12:49:00Z,eventName=GetPolicy

The following example uses the filter verb's support for OPAL functions to call contains, which is case-sensitive:

filter contains(eventName,"GetPolicy") //matches
filter contains(eventName,"getpolicy") // does not match