Transformer parses dynamic property lookup in brackets to static string lookup

[patrick-entinux]

What I wrote:

const type = oc(questionSet).questions[initialQuestionId].type();

Output after compilation with transformer (formatted for readability):

const type =
  questionSet != null &&
  questionSet.questions != null &&
  questionSet.questions.initialQuestionId != null &&
  questionSet.questions.initialQuestionId.type != null
    ? questionSet.questions.initialQuestionId.type
    : undefined;

However, initialQuestionId is not the name of the key but a variable reference to another string with the property name, the compiled code should look something like:

const type =
  questionSet != null &&
  questionSet.questions != null &&
  questionSet.questions[initialQuestionId] != null &&
  questionSet.questions[initialQuestionId].type != null
    ? questionSet.questions[initialQuestionId].type
    : undefined;

This is using typescript 3.5.3.