Before we answer that, these guys have real names. Artem Stoliarov goes by Arty and he’s suing Christopher Comstock. He’s Marshmello. I probably won’t use their real names again. The complaint, filed last week, says Marshmello’s monster hit song, “Happier,” infringes upon Arty’s remix of “I Lived,” by One Republic. So, why isn’t One Republic …