With all due respect, I think you should learn some English. Doing this might just help you differentiate between a question, and a demand.
The sentence "Is your plugin able to do something like that?" is not only phrased as a question, it is also terminated with a question mark, which is a dead giveaway that I was asking a question, as opposed to making a demand, or expressing an expectation.
A demand, or an expectation, is often terminated with an exclamation mark. Here is an example:
It is incredibly rude to post a PM in public without asking the original poster if they have any objections first, please avoid this in the future!