check_gsmvar: Checks whether the given object has class attribute 'gsmvar'
Description
check_gsmvar
checks that the object has class attribute 'gsmvar'.
Usage
check_gsmvar(object, object_name)
Value
Throws an error if the object doesn't have the class attribute 'gsmvar'.
Arguments
- object
S3 object to be tested
- object_name
what is the name of the object that should of class 'gsmvar'?