whole_func_string: function (obj, src) {
    var result = false
    var key
    for (key in obj) {
      if (obj.hasOwnProperty(key) && key === src) result = true
    }
    return result
  }
func_code_string: function (obj, src) {
    var result = false
    var key
    for (key in obj) {
      if (obj.hasOwnProperty(key) && key === src) result = true
    }
    return result
  }
func_documentation_string: return boolen
  - check if key has in object