getOffset method
Implementation
double? getOffset(
{SubField? subField, String? subFieldName, int? subFieldIndex}) {
SubField? sb;
if (subField != null) {
sb = subField;
} else if (subFieldName != null) {
sb = getSubField(name: subFieldName);
} else if (subFieldIndex != null) {
sb = getSubField(index: subFieldIndex);
}
if (sb == null) {
return offset;
} else {
return sb.offset;
}
}