kubernetes/vendor/golang.org/x/tools/go/types/typeutil/methodsetcache.go

type MethodSetCache …

// MethodSet returns the method set of type T.  It is thread-safe.
//
// If cache is nil, this function is equivalent to types.NewMethodSet(T).
// Utility functions can thus expose an optional *MethodSetCache
// parameter to clients that care about performance.
func (cache *MethodSetCache) MethodSet(T types.Type) *types.MethodSet { … }

func (cache *MethodSetCache) lookupNamed(named *types.Named) struct{ … }