@Nullable
    public String findTokenString(int id) {
        return tokenStringById.get(id - KNOWN_TOKEN_ID_BASE);
    }
Get SQLBlockCompletionInfo by block beginning token id.
plugins/org.jkiss.dbeaver.ui.editors.sql/src/org/jkiss/dbeaver/ui/editors/sql/indent/SQLBlockCompletionsCollection.java