func (r *RequestBuilder) Header(name, value string) *RequestBuilder {
	if r.headers == nil {
		r.headers = make(map[string]string, 1)
	}
	r.headers[name] = value
	return r
}
func (r *RequestBuilder) Header(name, value string) *RequestBuilder {
	if r.headers == nil {
		r.headers = make(map[string]string, 1)
	}
	r.headers[name] = value
	return r
}
func ( r * RequestBuilder ) Header ( name , value string ) * RequestBuilder { if r . headers == nil { r . headers = make ( map [ string ] string , 1 ) } r . headers [ name ] = value return r }
// Header sets the given header.
Header sets the given header .