Guesses whether the source is read only.
This is done on some heuristic like the source backend, where some are known to be read only. That this function returns
false does not necessarily mean the source is writable, it only means the source is not well-known
read-only source. To know for sure open the corresponding Client, if the source
references such, and use is_readonly.
| source |
an Source |
|
true, when the |