in src/printers.ts [170:182]
function printFields(type) {
const fields = objectValues(type.getFields()).map(
(f, i) =>
printDescription(f, ' ', !i) +
' ' +
f.name +
printArgs(f.args, ' ') +
': ' +
String(f.type) +
printDirectiveField(f),
);
return printBlock(type, fields);
}