metamask-extension/ui/helpers/utils/metrics.js

export function getMethodName(camelCase) {
  if (!camelCase || typeof camelCase !== 'string') {
    return '';
  }

  return camelCase
    .replace(/([a-z])([A-Z])/gu, '$1 $2')
    .replace(/([A-Z])([a-z])/gu, ' $1$2')
    .replace(/ +/gu, ' ');
}