func (h *RequestHeader) SetContentType(contentType string) {
	h.parseRawHeaders()
	h.contentType = append(h.contentType[:0], contentType...)
}
func (h *RequestHeader) SetContentType(contentType string) {
	h.parseRawHeaders()
	h.contentType = append(h.contentType[:0], contentType...)
}
func ( h * RequestHeader ) SetContentType ( contentType string ) { h . parseRawHeaders ( ) h . contentType = append ( h . contentType [ : 0 ] , contentType ... ) }
// SetContentType sets Content-Type header value.
SetContentType sets Content - Type header value .