code: public static Type getReturnType(final String methodDescriptor) {
          char[] buf = methodDescriptor.toCharArray();
          return getType(buf, methodDescriptor.indexOf(')') + 1);
      }
docs: Returns the Java type corresponding to the return type of the given
  method descriptor.
  
  @param methodDescriptor a method descriptor.
  @return the Java type corresponding to the return type of the given
  method descriptor.