src/main/java/org/apache/datasketches/vector/decomposition/PreambleUtil.java [228:239]:
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    final long cap = mem.getCapacity();
    if (cap < Long.BYTES) { throwNotBigEnough(cap, Long.BYTES); }
    final int preLongs = extractPreLongs(mem);
    final int required = Math.max(preLongs << 3, Long.BYTES);
    if (cap < required) { throwNotBigEnough(cap, required); }
    return preLongs;
  }

  private static void throwNotBigEnough(final long cap, final int required) {
    throw new IllegalArgumentException(
            "Possible Corruption: Size of byte array or Memory not large enough: Size: " + cap
                    + ", Required: " + required);
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src/main/java/org/apache/datasketches/vector/matrix/MatrixPreambleUtil.java [214:225]:
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    final long cap = mem.getCapacity();
    if (cap < Long.BYTES) { throwNotBigEnough(cap, Long.BYTES); }
    final int preLongs = extractPreLongs(mem);
    final int required = Math.max(preLongs << 3, Long.BYTES);
    if (cap < required) { throwNotBigEnough(cap, required); }
    return preLongs;
  }

  private static void throwNotBigEnough(final long cap, final int required) {
    throw new IllegalArgumentException(
            "Possible Corruption: Size of byte array or Memory not large enough: Size: " + cap
                    + ", Required: " + required);
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