Forge custom field type Search suggestions

Hi there,

We are trying to override the the default suggestion as indicated here https://developer.atlassian.com/platform/forge/manifest-reference/modules/jira-custom-field/#search-suggestions .

But i’m getting this error Jira expression failed to parse: line 1, column 28:
*., ?., [, ?.[, (, , /, %, +, -, <, <=, >, >=, ==, !=, &&, ||, ??, ? or ] expected, EOF encountered

how can i resolve this error?
Is there a example that use function instead of expression?

this is manifest file:


Screenshot 2022-09-29 at 17.59.22

Thanks