[SOLVED] How to use groovy as script extension?

I think i'm starting to get it, but i still need some documentation. Bellow is how i'm doing. If there is something i could do better, please, say it.

NEWLINE = System.getProperty("line.separator")

def getJavaType(dataType) {
    //TODO
}

SELECTION.each {
    if (it.class.canonicalName == "com.intellij.database.psi.DbTableImpl") {
        columns = it.getDbChildren(com.intellij.database.psi.DbColumn.class, com.intellij.database.model.ObjectKind.COLUMN)
        buffer = ""
        columns.each {
            buffer += it.name + " / " + it.getDataType().toString() + NEWLINE
        }
        CLIPBOARD.set(buffer)
    }
}

I learned how to do it in the hard way.

My script generates an POJO to be used by the ActiveJdbc ORM framework working with Oracle databases.

For anyone that needs a simple example script: https://github.com/uliss3s/utils/blob/master/scripts/groovy/ActiveJdbcOraclePojoGenerator.groovy

Thank you very much for this example. 

Code generation options could be a very powerful feature of Datagrip. Shame that it is so poorly documented by Jetbrains. 

... still the case. 

still the case.. 2023 now.. come one guys.. get this right