return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    PairedStats other = (PairedStats) obj;
    return xStats.equals(other.xStats)
        && yStats.equals(other.yStats)
        && doubleToLongBits(sumOfProductsOfDeltas) == doubleToLongBits(other.sumOfProductsOfDeltas);
  }

  /**
   * {@inheritDoc}
   *

  // finalizer will be added to/removed from the object's finalizers list.
  // Either this field or PropagationPolicy may be set, but not both.
  // +optional
  optional bool orphanDependents = 3;

  // Whether and how garbage collection will be performed.
  // Either this field or OrphanDependents may be set, but not both.
  // The default policy is decided by the existing finalizer set in the

      upEnd = other.getUpperEndpoint();
      upType = other.getUpperBoundType();
    } else if (other.hasUpperBound()) {
      int cmp = comparator.compare(getUpperEndpoint(), other.getUpperEndpoint());
      if (cmp > 0 || (cmp == 0 && other.getUpperBoundType() == OPEN)) {
        upEnd = other.getUpperEndpoint();
        upType = other.getUpperBoundType();
      }
    }

    if (hasLowBound && hasUpBound) {

 *
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

package com.google.common.util.concurrent;

import static com.google.common.collect.Iterables.getOnlyElement;

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      other commercial damages or losses), even if such Contributor
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      the Work or Derivative Works thereof, You may choose to offer,
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      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this

      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this

      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this

      other commercial damages or losses), even if such Contributor
      has been advised of the possibility of such damages.

   9. Accepting Warranty or Additional Liability. While redistributing
      the Work or Derivative Works thereof, You may choose to offer,
      and charge a fee for, acceptance of support, warranty, indemnity,
      or other liability obligations and/or rights consistent with this