Returns whether or not the current JVM configuration supports retransformation
The ability to retransform an already loaded class is an optional capability
of a JVM.
Retransformation will only be supported if the
Can-Retransform-Classes manifest attribute is set to
true in the agent JAR file (as described in the
package specification) and the JVM supports
During a single instantiation of a single JVM, multiple calls to this
method will always return the same answer.