The method gatherInformation() does not seem to exist on object<NinjaMutex\Lock\B...ockInformationProvider>.
This check looks for calls to methods that do not seem to exist on a given type.
It looks for the method on the type itself as well as in inherited classes or
implemented interfaces.
This is most likely a typographical error or the method has been renamed.
It seems like you call parent on a different method (gatherInformation() instead of getLockInformation()). Are you sure this is correct? If so, you might want to change this to $this->gatherInformation().
This check looks for a call to a parent method whose name is different than
the method from which it is called.
This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.