merge method
Implementation
void merge(Map<int, UPdfXrefEntry> other) {
other.forEach((int key, UPdfXrefEntry value) {
entries.putIfAbsent(key, () => value);
});
}
void merge(Map<int, UPdfXrefEntry> other) {
other.forEach((int key, UPdfXrefEntry value) {
entries.putIfAbsent(key, () => value);
});
}