jodd-proxetta/src/main/java/jodd/asm7/Type.java
public static String getMethodDescriptor(final Method method) {
    StringBuilder stringBuilder = new StringBuilder();
    stringBuilder.append('(');
    Class<?>[] parameters = method.getParameterTypes();
    for (Class<?> parameter : parameters) {
      appendDescriptor(parameter, stringBuilder);
    }
    stringBuilder.append(')');
    appendDescriptor(method.getReturnType(), stringBuilder);
    return stringBuilder.toString();
  }
public static String getMethodDescriptor(final Method method) {
    StringBuilder stringBuilder = new StringBuilder();
    stringBuilder.append('(');
    Class<?>[] parameters = method.getParameterTypes();
    for (Class<?> parameter : parameters) {
      appendDescriptor(parameter, stringBuilder);
    }
    stringBuilder.append(')');
    appendDescriptor(method.getReturnType(), stringBuilder);
    return stringBuilder.toString();
  }
Returns the descriptor corresponding to the given method.

@param method a {@link Method} object.
@return the descriptor of the given method.