message: figure if file is a module
diff: @@ -63,6 +63,13 @@ export default function tracer(
  const traceVar = factory.createUniqueName("$trace")
  const tracing = factory.createUniqueName("tracing")
  + const isModule =
  + sourceFile.statements.find((s) => /(import|export)/.test(s.getText())) != null
  +
  + if (!isModule) {
  + return sourceFile
  + }
  +
  const regions = sourceFullText
  .split("\n")
  .map((line, i) => {
  