code: func IsBlank(str string) bool {
  	strLen := len(str)
  	if str == "" || strLen == 0 {
  		return true
  	}
  	for i := 0; i < strLen; i++ {
  		if unicode.IsSpace(rune(str[i])) == false {
  			return false
  		}
  	}
  	return true
  }
docs: /*
  IsBlank checks if a string is whitespace or empty (""). Observe the following behavior:
  
      goutils.IsBlank("")        = true
      goutils.IsBlank(" ")       = true
      goutils.IsBlank("bob")     = false
      goutils.IsBlank("  bob  ") = false
  
  Parameter:
      str - the string to check
  
  Returns:
      true - if the string is whitespace or empty ("")
  */