Accessors not generated for rule with multiple same tokens

I have a problem with getters not being generated for the PsiElement's when using multiple regexp tokens of the _same type in one rule_.

```
{
...
tokens = [
NUMBER = 'regexp:\d[_\d]*'
]
}

UnpackedDimension ::= '[' NUMBER ':' NUMBER ']' {
methods = [
first = "/NUMBER[0]"
last = "/NUMBER[1]"
]
}
```

When running `Generate Parser Code`, the generated class MyUnpackedDimension does not have getters for the two numbers.

So I added the methods `first` and `last`, however these give me the error:

```
UnpackedDimension#first("/NUMBER[0]"): 'NUMBER' not found in 'UnpackedDimension' (available: COLON, LBRACK, RBRACK)
```

If I implement `NUMBER` _as a rule_, not a token:

```
fake NumberRule ::= NUMBER

UnpackedDimension ::= '[' NumberRule ':' NumberRule ']'
```

Then I get a `getNumberRuleList` function generated. Why can I generate this for a token directly?

Thanks in advance :)

Start with the grammar snippets and the Generate Parser Code entry point, then compare token handling with the rule-based NumberRule example in the generated MyUnpackedDimension class. Reproduce the missing accessors and the NUMBER-not-found error; the issue is resolved when repeated NUMBER tokens receive usable generated accessors like the rule form.

Written by the indexing model from the issue text.