Adapt the comments in JSDoc format (in `utils.ts`)

[carma12]

The comments in the utils.ts file should be adapted into JSDoc format. This way, its description can be seen when it is used anywhere and this functionality is compatible with many IDEs.

E.g., Instead of:

// Here is a description
// Two lines have been added

Do:

/*
* Here is a description
* Two lines have been added 
*/