var ErrNotSupported = internal.ErrNotSupported
 func RawAttachProgram(opts RawAttachProgramOptions) error
 func RawDetachProgram(opts RawDetachProgramOptions) error
+type CgroupOptions struct{ ... }
+type Iter struct{ ... }
+    func AttachIter(opts IterOptions) (*Iter, error)
+    func LoadPinnedIter(fileName string) (*Iter, error)
+type IterOptions struct{ ... }
 type Link interface{ ... }
+    func AttachCgroup(opts CgroupOptions) (Link, error)
+    func LoadPinnedCgroup(fileName string) (Link, error)
 type RawAttachProgramOptions struct{ ... }
 type RawDetachProgramOptions struct{ ... }
 type RawLink struct{ ... }