code: function histogramBinHoverProvider(publicAPI, model) {
    if (!model.hoverState) {
      model.hoverState = {};
    }
  
    publicAPI.setHoverState = (hoverState) => {
      model.hoverState = hoverState;
      publicAPI.fireHoverBinChange(model.hoverState);
    };
  }
docs: ---------------------------------------------------------------------------- Histogram Bin Hover Provider ----------------------------------------------------------------------------