kibana/x-pack/plugins/lens/public/visualization_container.scss

.lnsVisualizationContainer {
  @include euiScrollBar;
  overflow: auto;
}

.lnsExpressionRenderer {
  @include euiScrollBar;
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  overflow: auto;

  .lnsExpressionRenderer__component {
    position: static; // Let the progress indicator position itself against the outer parent
  }
}

.lnsEmbeddedError {
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: auto;
}