// - if below/above plot area, give it the maximum potential margin-push value
  // - otherwise, extend the height of the plot area
  legendObj._maxHeight = Math.max(
    (isBelowPlotArea || isAbovePlotArea) ? fullLayout.height / 2 : gs.h,
    30
  );
  // _maxHeight is also limited by the container if it is anchored to it
  if (legendObj.yref === 'container' && legendObj._maxHeight > 30) {
    var yanchor = getYanchor(legendObj);
    var containerAllowedHeight;
    if (yanchor === 'top')
      containerAllowedHeight = legendObj.y * fullLayout.height;
    else if (yanchor === 'bottom')
      containerAllowedHeight = (1 - legendObj.y) * fullLayout.height;
    else // if (yanchor === 'middle')
      containerAllowedHeight = 2 * Math.min(1 - legendObj.y, legendObj.y) * fullLayout.height;
    legendObj._maxHeight = Math.min(containerAllowedHeight, legendObj._maxHeight);
  }