Jaxb2 plugin in kotlin gradle

Hi, Thanks for the response. I am new to Gradle and this is my first project. I have used the same but getting some issues,

For Request-Classes - Expression ‘‘request-classes’’ of type ‘Char’ cannot be invoked as a function. The function ‘invoke()’ is not found
Too many characters in a character literal ‘‘request-classes’’

basePackage: Unresolved reference: basePackage
schema: Unresolved reference: schema

jaxb2 issue