function _classCallCheck(instance, Constructor) {
            if (!(instance instanceof Constructor)) {
              throw new TypeError('Cannot call a class as a function');
            }
          }
@for p5
@requires core
These are functions that are part of the Processing API but are not part of
the p5.js API. In some cases they have a new name, in others, they are
removed completely. Not all unsupported Processing functions are listed here
but we try to include ones that a user coming from Processing might likely
call.