question: protected void updateBoundariesAndOrWeights ( ) { if ( m_Weights != null ) { return ; } double mean = m_WeightedSum / m_SumOfWeights ; double variance = m_WeightedSumSquared / m_SumOfWeights - mean * mean ; if ( variance < 0 ) { variance = 0 ; } m_Width = Math . sqrt ( variance ) * Math . pow ( m_SumOfWeights , m_Exponent ) ; if ( m_Width <= m_MinWidth ) { m_Width = m_MinWidth ; } if ( getUpdateWeightsOnly ( ) ) { updateWeightsOnly ( ) ; } else { updateBoundariesAndWeights ( ) ; } }
target:  Updates the boundaries if necessary.