src/javascript/xhr/FormData.js
function(cb) {
				Basic.each(_fields, function(field) {
					cb(field.value, field.name);
				});

				if (_blob) {
					cb(_blob.value, _blob.name);
				}
			}
function(cb) {
				Basic.each(_fields, function(field) {
					cb(field.value, field.name);
				});

				if (_blob) {
					cb(_blob.value, _blob.name);
				}
			}
Loop over the fields in FormData and invoke the callback for each of them.

@method each
@param {Function} cb Callback to call for each field