https://www.kernel.org/doc/Documentation/cgroup-v1/cgroups.txt.

GetAllPids returns all pids, that were added to cgroup at path and to all its subcgroups.

GetAllSubsystems returns all the cgroup subsystems supported by the kernel.

GetPids returns all pids, that were added to cgroup at path.

GetThisCgroupDir returns the relative path to the cgroup docker is running in.

RemovePaths iterates over the provided paths removing them.

CpuUsage denotes the usage of a CPU.