Undo adding of default function to keep existing default behavior or throwing a runtime error

woutervh- · woutervh- · commit 99af0863112c · 2019-09-23T21:08:52.000+02:00
diff --git a/index.js b/index.js
@@ -1,4 +1,4 @@
-let defaultGetErrorMessage = () => null;
+let defaultGetErrorMessage = undefined;
 
 function checkGetErrorMessage(getErrorMessage) {
     if (typeof getErrorMessage !== 'function') {

Original file line number	Diff line number	Diff line change
`@@ -1,4 +1,4 @@`
`1`		`-let defaultGetErrorMessage = () => null;`
	`1`	`+let defaultGetErrorMessage = undefined;`
`2`	`2`
`3`	`3`	`function checkGetErrorMessage(getErrorMessage) {`
`4`	`4`	`if (typeof getErrorMessage !== 'function') {`