code: function removePrefix(str, prefixToken) {
    const index =  str.indexOf(prefixToken);
  
    if (index > -1) {
      str = str.substr(index + prefixToken.length).trim();
    }
    return str;
  }
docs: Finds prefixToken, and removes it and anything before it.
  
  @param {string} str
  @param {string} prefixToken
  @returns {string}