isset

This keyword checks a bit or several bits to see if it is set. It returns true or false based on the following syntax.

Syntax:  
   flowbits:isset, bits => Check whether any bit is set
   flowbits:isset, bats => Check whether all bits are set
   flowbits:isset, any, group => Check whether any bit in the group is set.
   flowbits:isset, all, group => Check whether all bits in the group are set. 
   
Usage
   flowbits:isset, bit1|bit2 => If either bit1 or bit2 is set, return true
   flowbits:isset, bit1&bit2 => If both bit1 and bit2 are set, return true, otherwise false
   flowbits:isset, any, doc => If any bit in group doc is set, return true
   flowbits:isset, all, doc => If all the bits in doc group are set, return true