features/core/src/main/java/org/apache/karaf/features/internal/region/Subsystem.java [675:692]:
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    Map<String, String> getMetadata(StreamProvider provider) throws IOException {
        try (
                ZipInputStream zis = new ZipInputStream(provider.open())
        ) {
            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                if (MANIFEST_NAME.equals(entry.getName())) {
                    Attributes attributes = new Manifest(zis).getMainAttributes();
                    Map<java.lang.String, java.lang.String> headers = new HashMap<>();
                    for (Map.Entry attr : attributes.entrySet()) {
                        headers.put(attr.getKey().toString(), attr.getValue().toString());
                    }
                    return headers;
                }
            }
        }
        throw new IllegalArgumentException("Resource " + provider.getUrl() + " does not contain a manifest");
    }
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profile/src/main/java/org/apache/karaf/profile/assembly/Builder.java [2303:2320]:
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    private Map<String, String> getHeaders(StreamProvider provider) throws IOException {
        try (
                ZipInputStream zis = new ZipInputStream(provider.open())
        ) {
            ZipEntry entry;
            while ((entry = zis.getNextEntry()) != null) {
                if (MANIFEST_NAME.equals(entry.getName())) {
                    Attributes attributes = new Manifest(zis).getMainAttributes();
                    Map<String, String> headers = new HashMap<>();
                    for (Map.Entry attr : attributes.entrySet()) {
                        headers.put(attr.getKey().toString(), attr.getValue().toString());
                    }
                    return headers;
                }
            }
        }
        throw new IllegalArgumentException("Resource " + provider.getUrl() + " does not contain a manifest");
    }
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