in log4j-converter-config/src/main/java/org/apache/logging/converter/config/internal/v2/PropertiesV2ConfigurationParser.java [361:369]
private static Stream<PropertiesSubset> partitionOnGivenPrefixes(PropertiesSubset properties, String prefixes) {
Stream.Builder<PropertiesSubset> builder = Stream.builder();
for (String prefix : prefixes.split(COMMA_SEPARATOR, -1)) {
if (!prefix.isEmpty()) {
builder.add(extractSubset(properties, prefix));
}
}
return builder.build();
}