code: function checkNamespaceSeparator(i) {
    if (i >= tokensLength) return 0;
  
    if (tokens[i].type !== TokenType.VerticalLine) return 0;
  
    // Return false if `|=` - [attr|=value]
    if (tokens[i + 1] && tokens[i + 1].type === TokenType.EqualsSign) return 0;
  
    return 1;
  }
docs: (1) `|`