We will need ClassDescriptor resolver. Due to inconsistent 
source there can be a situation when simple type name 
cannot be resolved to FQN because referenced class or its 
package is not available or its codebase is not part of 
current classpath. This situation occurs mainly when using 
package import and then resolving simple name against this 
package. The ClassDescriptor resolver should monitor 
adding new codebases to classpath and new classes to 
codebase and consequently it should find and try to 
resolve unresolved ClassDecriptors with the same simple 
name as those of added classes.