guava/src/com/google/common/hash/BloomFilter.java
public static <T> Collector<T, ?, BloomFilter<T>> toBloomFilter(
      Funnel<? super T> funnel, long expectedInsertions, double fpp) {
    checkNotNull(funnel);
    checkArgument(
        expectedInsertions >= 0, "Expected insertions (%s) must be >= 0", expectedInsertions);
    checkArgument(fpp > 0.0, "False positive probability (%s) must be > 0.0", fpp);
    checkArgument(fpp < 1.0, "False positive probability (%s) must be < 1.0", fpp);
    return Collector.of(
        () -> BloomFilter.create(funnel, expectedInsertions, fpp),
        BloomFilter::put,
        (bf1, bf2) -> {
          bf1.putAll(bf2);
          return bf1;
        },
        Collector.Characteristics.UNORDERED,
        Collector.Characteristics.CONCURRENT);
  }
public static <T> Collector<T, ?, BloomFilter<T>> toBloomFilter(
      Funnel<? super T> funnel, long expectedInsertions, double fpp) {
    checkNotNull(funnel);
    checkArgument(
        expectedInsertions >= 0, "Expected insertions (%s) must be >= 0", expectedInsertions);
    checkArgument(fpp > 0.0, "False positive probability (%s) must be > 0.0", fpp);
    checkArgument(fpp < 1.0, "False positive probability (%s) must be < 1.0", fpp);
    return Collector.of(
        () -> BloomFilter.create(funnel, expectedInsertions, fpp),
        BloomFilter::put,
        (bf1, bf2) -> {
          bf1.putAll(bf2);
          return bf1;
        },
        Collector.Characteristics.UNORDERED,
        Collector.Characteristics.CONCURRENT);
  }
Returns a {@code Collector} expecting the specified number of insertions, and yielding a {@link
BloomFilter} with the specified expected false positive probability.

<p>Note that if the {@code Collector} receives significantly more elements than specified, the
resulting {@code BloomFilter} will suffer a sharp deterioration of its false positive
probability.

<p>The constructed {@code BloomFilter} will be serializable if the provided {@code Funnel<T>}
is.

<p>It is recommended that the funnel be implemented as a Java enum. This has the benefit of
ensuring proper serialization and deserialization, which is important since {@link #equals}
also relies on object identity of funnels.

@param funnel the funnel of T's that the constructed {@code BloomFilter} will use
@param expectedInsertions the number of expected insertions to the constructed {@code
BloomFilter}; must be positive
@param fpp the desired false positive probability (must be positive and less than 1.0)
@return a {@code Collector} generating a {@code BloomFilter} of the received elements
@since 23.0