code: protected void setTargetClass(Class targetClass) {
  		this.targetClass = targetClass;
  		this.readAccessors.clear();
  		this.writeAccessors.clear();
  		introspectMethods(targetClass, new HashSet());
  		if (isFieldAccessEnabled()) {
  			introspectFields(targetClass, new HashSet());
  		}
  	}
docs: Clears all cached members and introspect methods again. If fieldAccess is
  enabled introspect fields as well.
  
  @param targetClass the target class.