public String javaPackage() {
        return javaPackage;
    }
Returns a name that can be safely used as a local variable in the generated
config class for the given node. The name will be based on the given basis
string, but the basis itself is not a possible return value.

@param node the node to find a unused symbol name for.
@param basis the basis for the generated symbol name.
@return a name that is not used in the given config node.
configgen/src/main/java/com/yahoo/config/codegen/JavaClassBuilder.java