This method returns the OrientDB base class for vertices, which by default is the
OrientDB borrows from the Object Oriented Programming paradigm the concept of a class. Where a cluster indicates where you want to store a record, classes indicate the types of records you want to store. Classes can have inherit from super classes and themselves have subclasses.
In a graph database, the base class for a vertex is the
V class. This method retrieves
V into your function, allowing you to operate on the class.
var vclass = db.getVertexBaseType()