code: function getFunctionCalls(call, functionRE) {
    var expressions = []
  
    var fnRE = typeof functionRE === "string" ? new RegExp("\\b(" + functionRE + ")\\(") : functionRE
    do {
      var searchMatch = fnRE.exec(call)
      if (!searchMatch) {
        return expressions
      }
      if (searchMatch[1] === undefined) {
        throw new Error("Missing the first couple of parenthesis to get the function identifier in " + functionRE)
      }
      var fn = searchMatch[1]
      var startIndex = searchMatch.index
      var matches = balanced("(", ")", call.substring(startIndex))
  
      if (!matches || matches.start !== searchMatch[0].length - 1) {
        throw new SyntaxError(fn + "(): missing closing ')' in the value '" + call + "'")
      }
  
      expressions.push({matches: matches, functionIdentifier: fn})
      call = matches.post
    }
    while (fnRE.test(call))
  
    return expressions
  }
docs: Parses expressions in a value
  
  @param {String} value
  @returns {Array}
  @api private