Function logInvalidThemeOnce

src/cm/themes/index.js:69–76

(themeId, error, reason = "")

}

function logInvalidThemeOnce(themeId, error, reason = "") {
	if (warnedInvalidThemes.has(themeId)) return;
	warnedInvalidThemes.add(themeId);
	const message = reason
		? `[editorThemes] Theme '${themeId}' is invalid: ${reason}`
		: `[editorThemes] Theme '${themeId}' is invalid.`;
	console.error(message, error);
}

function validateThemeExtensions(themeId, extensions) {
	if (!extensions.length) {