filterBooleanToString()
filterBooleanToString(bool $param) : string
Convert bool true and false to string 'true' and 'false'.
This is necessary to prevent Guzzle from converting the query parameter to ?param=0 or ?param=1, which the backend does not recognize.
The backend only recognizes query parameter ?param=true and ?param=false.
Parameters
| bool | $param |