This methods retrieves the given vertex class.
OrientDB borrows the concept of class from the Object Oriented Programming paradigm. Classes can have subclasses and inherit from superclasses. A vertex class is any that extends the base vertex class
Using this method, you can retrieve the given vertex class instance, allowing you to operate on the class from within your function.
var vclass = db.getVertexType(<class>)
<class>Defines the name of the class.