No default nor completion for --typeName

When I create a new field on an existing entity I write this :

jpa-new-field --entity org.model.Test --fieldName lastname --typeName String
***SUCCESS*** Field lastname created

If I don't write String the command doesn't give me completion. I would expect that writing the following and hitting TAB would give me some basic datatypes (String, int, float...)

jpa-new-field --entity org.model.Test --fieldName lastname --typeName

And why not having String as the default type ? This command would create a lastname of type String by default :

jpa-new-field --entity org.model.Test --fieldName lastname

Instead I have an error saying that "Type must be specified"

jpa-new-field --entity org.model.Test --fieldName lastname
Type must be specified