- isExisting
Test if the bits represent an existing key.
- isInternal
Test if an existing key is internal.
- isInvocable
Test if Message#INVOKE an existing key is supported.
- isReadable
Test if Message#READ an existing key is supported.
- isRemovable
Test if Message#WRITE a new key is supported.
- isWritable
Test if Message#READ an existing or new key is supported.
- isInsertable
Test if Message#WRITE a new key is supported.
- hasReadSideEffects
Test if Message#READ may have side-effects.
- hasWriteSideEffects
Test if Message#WRITE may have side-effects.