src/main/java/org/apache/netbeans/nbpackage/deb/DebTask.java [133:147]:
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    private String packageName() {
        if (packageName == null) {
            var name = sanitize(context().getValue(NBPackage.PACKAGE_NAME).orElseThrow());
            if (name.length() < 2 || !Character.isLetter(name.charAt(0))) {
                throw new IllegalArgumentException();
            }
            packageName = name;
        }
        return packageName;
    }

    private String packageVersion() {
        if (packageVersion == null) {
            var version = sanitizeVersion(context().getValue(NBPackage.PACKAGE_VERSION)
                    .orElse("1.0"));
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src/main/java/org/apache/netbeans/nbpackage/rpm/RpmTask.java [161:175]:
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    private String packageName() {
        if (packageName == null) {
            var name = sanitize(context().getValue(NBPackage.PACKAGE_NAME).orElseThrow());
            if (name.length() < 2 || !Character.isLetter(name.charAt(0))) {
                throw new IllegalArgumentException();
            }
            packageName = name;
        }
        return packageName;
    }

    private String packageVersion() {
        if (packageVersion == null) {
            var version = sanitizeVersion(context().getValue(NBPackage.PACKAGE_VERSION)
                    .orElse("1.0"));
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