src/third_party/devtools/node_modules/@babel/types/scripts/utils/formatBuilderName.js - cobalt - Git at Google

 "use strict";

 const toLowerCase = Function.call.bind("".toLowerCase);

 module.exports = function formatBuilderName(type) {
   // FunctionExpression -> functionExpression
   // JSXIdentifier -> jsxIdentifier
   // V8IntrinsicIdentifier -> v8IntrinsicIdentifier
   return type.replace(/^([A-Z](?=[a-z0-9])|[A-Z]+(?=[A-Z]))/, toLowerCase);
 };
	"use strict";

	const toLowerCase = Function.call.bind("".toLowerCase);

	module.exports = function formatBuilderName(type) {
	// FunctionExpression -> functionExpression
	// JSXIdentifier -> jsxIdentifier
	// V8IntrinsicIdentifier -> v8IntrinsicIdentifier
	return type.replace(/^([A-Z](?=[a-z0-9])\|[A-Z]+(?=[A-Z]))/, toLowerCase);
	};