message: Added: function to open and close ItemsObject's item.
diff: }
  &__item {
  - padding: 34px 24px;
  + padding: 24px;
  background-color: var(--color-base-gray-tertiary);
  border: 1px solid var(--color-base-gray);
  border-radius: 2px;
  +
  + & > .Parameters_Items__itemDetail {
  + display: none;
  + }
  +
  + & > .Parameters_Items__itemBrief {
  + display: block;
  + cursor: pointer;
  + }
  +
  + &--opened > .Parameters_Items__itemDetail {
  + display: block;
  }
  - & .Parameters_Items__item {
  + &--opened > .Parameters_Items__itemBrief {
  + display: none;
  + }
  + }
  +
  + &__body > .Parameters_Items__item {
  margin-bottom: 8px;
  &:last-child {
  &__itemHead {
  @apply --layout-center-start;
  - margin-bottom: 32px;
  + display: none;
  + margin-bottom: 24px;
  + }
  +
  + &__itemTail {
  + @apply --layout-center-between;
  + margin-top: 24px;
  }
  &__removeButton {
  color: var(--color-base-blue);
  }
  }
  +
  + &__closeButton {
  + @apply --layout-center-between;
  + font-size: 1.4rem;
  + cursor: pointer;
  +
  + &:hover,
  + &.hold {
  + color: var(--color-base-blue);
  + }
  +
  + & .Icon {
  + width: 16px;
  + height: 16px;
  + }
  + }
  +
  + &__closeButtonLabel {
  + margin-right: 8px;
  + }
  }
  