subtract
Subtracts all attributes of @subtract from @matcher and returns a matcher that supports those attributes.
Note that currently it is not possible to remove a single attribute when the @matcher matches the whole namespace - or remove a namespace or attribute when the matcher matches everything. This is a limitation of the current implementation, but may be fixed in the future.
Return
A file attribute matcher matching all attributes of @matcher that are not matched by @subtract
Parameters
subtract
The matcher to subtract