kubernetes/vendor/golang.org/x/text/cases/fold.go

type caseFolder …

// caseFolder implements the Transformer interface for doing case folding.
func (t *caseFolder) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) { … }

func (t *caseFolder) Span(src []byte, atEOF bool) (n int, err error) { … }

func makeFold(o options) transform.SpanningTransformer { … }