if (isNaN(sumOfSquaresOfDeltas)) {
      return NaN;
    }
    if (count == 1) {
      return 0.0;
    }
    return ensureNonNegative(sumOfSquaresOfDeltas) / count();
  }

  /**
   * Returns the <a
   * href="http://en.wikipedia.org/wiki/Standard_deviation#Definition_of_population_values">
   * population standard deviation</a> of the values. The count must be non-zero.
   *

    }

    @Test
    @DisplayName("Test writeSetupWireFormat returns 0")
    void testWriteSetupWireFormat() {
        byte[] buffer = new byte[100];
        int result = response.writeSetupWireFormat(buffer, 0);

        assertEquals(0, result);
    }

    @Test
    @DisplayName("Test writeParametersWireFormat returns 0")
    void testWriteParametersWireFormat() {
        byte[] buffer = new byte[100];

        this.parent = parent;
    }

    /**
     * Returns the number of key-value mappings in this map.
     *
     * @return the number of key-value mappings in this map
     */
    @Override
    public int size() {
        return parent.size();
    }

    /**
     * Returns true if this map contains no key-value mappings.
     *
     * @return true if this map contains no key-value mappings
     */

    return (ImmutableSortedSet<E>) RegularImmutableSortedSet.NATURAL_EMPTY_SET;
  }

  /** Returns an immutable sorted set containing a single element. */
  public static <E extends Comparable<? super E>> ImmutableSortedSet<E> of(E e1) {
    return new RegularImmutableSortedSet<>(ImmutableList.of(e1), Ordering.natural());
  }

  /**

   *
   * @throws IllegalArgumentException if {@code node} is not an element of this network
   */
  int inDegree(N node);

  /**
   * Returns the count of {@code node}'s {@link #outEdges(Object) outgoing edges} in a directed
   * network. In an undirected network, returns the {@link #degree(Object)}.
   *

import okio.BufferedSink
import okio.ByteString
import okio.FileSystem
import okio.Path
import okio.source

abstract class RequestBody {
  /** Returns the Content-Type header for this body. */
  abstract fun contentType(): MediaType?

  /**
   * Returns the number of bytes that will be written to sink in a call to [writeTo],
   * or -1 if that count is unknown.
   */
  @Throws(IOException::class)

  /** Returns the value at `index`. */
  fun value(index: Int): String = commonValue(index)

  /** Returns an immutable case-insensitive set of header names. */
  fun names(): Set<String> {
    val result = TreeSet(String.CASE_INSENSITIVE_ORDER)
    for (i in 0 until size) {
      result.add(name(i))
    }
    return result.unmodifiable()
  }

    return new IsNot(match);
  }

  /**
   * Returns a {@code char} matcher that matches any BMP character present in the given character
   * sequence. Returns a bogus matcher if the sequence contains supplementary characters.
   */
  public static CharMatcher anyOf(CharSequence sequence) {
    switch (sequence.length()) {
      case 0:
        return none();
      case 1:

    return value < min ? min : value < max ? value : max;
  }

  /**
   * Returns the values from each provided array combined into a single array. For example, {@code
   * concat(new short[] {a, b}, new short[] {}, new short[] {c}} returns the array {@code {a, b,
   * c}}.
   *
   * @param arrays zero or more {@code short} arrays

    return value < min ? min : value < max ? value : max;
  }

  /**
   * Returns the values from each provided array combined into a single array. For example, {@code
   * concat(new short[] {a, b}, new short[] {}, new short[] {c}} returns the array {@code {a, b,
   * c}}.
   *
   * @param arrays zero or more {@code short} arrays