static void assertHostInfo(PsiFile hostCopy, OffsetMap hostMap) {
    PsiUtilCore.ensureValid(hostCopy);
    if (hostMap.getOffset(CompletionInitializationContext.START_OFFSET) > hostCopy.getTextLength()) {
      throw new AssertionError("startOffset outside the host file: " + hostMap.getOffset(CompletionInitializationContext.START_OFFSET) + "; " + hostCopy);
    }
  }
static void assertHostInfo(PsiFile hostCopy, OffsetMap hostMap)