Returns the contextual information for validators created out by this factory. The contextual information
is a map of key-value pairs that can provide more details about validation failures. For example, if the
message is "Password may not be empty" and the map contains the key-value pair
{"username": "john.smith"}, the error message would be:
```console
Password may not be empty
username: john.smith
```
Returns the contextual information for validators created out by this factory. The contextual information is a map of key-value pairs that can provide more details about validation failures. For example, if the message is "Password may not be empty" and the map contains the key-value pair
{"username": "john.smith"}, the error message would be:```console Password may not be empty username: john.smith ```