message: track share side card experiment
diff: @@ -4,6 +4,7 @@ import { setup } from 'vue-class-component';
  import { Emit, Options, Prop, Vue, Watch } from 'vue-property-decorator';
  import { RouteLocationRaw } from 'vue-router';
  import { arrayRemove } from '../../../../utils/array';
  +import { trackExperimentEngagement } from '../../../../_common/analytics/analytics.service';
  import AppCommunityPill from '../../../../_common/community/pill/pill.vue';
  import { CommunityUserNotification } from '../../../../_common/community/user-notification/user-notification.model';
  import { configPostShareSide } from '../../../../_common/config/config.service';
  @@ -142,6 +143,7 @@ export default class AppPostPage extends Vue {
  }
  get shareCardOnSide() {
  + trackExperimentEngagement(configPostShareSide);
  return configPostShareSide.value;
  }
  @@ -429,6 +431,7 @@ export default class AppPostPage extends Vue {
  <style lang="stylus" scoped>
  @import '../variables'
  @import '../common'
  +import { trackExperimentEngagement } from '../../../../_common/analytics/analytics.service';
  .-controls-spacing
  padding-bottom: $-controls-spacing-xs
  