feature request: String member readStringUntil()

[dsyleixa]

error,
exit status 1
'class String' has no member named 'readStringUntil'

[per1234]

It is a method of the Stream class, not of the String class. So it is documented in the Stream reference:
https://www.arduino.cc/reference/en/language/functions/communication/stream/streamreadstringuntil/

[dsyleixa]

yes, I just noticed that by myself (cross-over posted/edited).
Nonetheless I would appreciate to have that additionally to substr() or whatever:

String s, str ="123456789abc";;
s=str.readStringUntil('a');
Serial.println(s);