Nice way to get next keyword of current keyword

[cdietrich]

we are working on improving our content assist therefore we want to figure out if the current keyword is followed
by another keyword in the grammar.

i have found these variants to seem working

const xStream = AstUtils.streamContents(keyword.$container, { range: keyword.$cstNode?.range })
const next = xStream.tail().head() // does not always seem to work
if (GrammarAST.isKeyword(next)) {
      consecutiveKeywordValue = next.value
}

if (keyword.$containerProperty !== undefined && keyword.$containerIndex !== undefined) {
      // eslint-disable-next-line @typescript-eslint/no-unsafe-assignment, @typescript-eslint/no-explicit-any, @typescript-eslint/no-unsafe-member-access
      const next = (keyword.$container as any)[keyword.$containerProperty][keyword.$containerIndex + 1]
      if (GrammarAST.isKeyword(next)) {
        consecutiveKeywordValue = next.value
      }
    }

is there a way to make this "nice"