.preserve-white-spaces-mixin(@enabled) when(@enabled=true) {
  sf + st {
    margin-top: @preserve-sf-and-st-spaces;
  }

  // button + button
  .@{ant-prefix}-btn + .@{ant-prefix}-btn:not(.@{ant-prefix}-btn-link),
  .@{ant-prefix}-btn + nz-popconfirm,
  nz-popconfirm + .@{ant-prefix}-btn,
  nz-popconfirm + nz-popconfirm,
  .@{ant-prefix}-btn + nz-button-group,
  nz-button-group + .@{ant-prefix}-btn,
  .@{ant-prefix}-btn + nz-dropdown,
  nz-dropdown + .@{ant-prefix}-btn,
  nz-popconfirm + nz-button-group,
  nz-button-group + nz-popconfirm {
    margin-left: @preserve-buttons-spaces;
  }
  .@{ant-prefix}-btn-group {
    .@{ant-prefix}-btn + .@{ant-prefix}-btn {
      margin-left: -1px;
    }
  }

  // fix ng-zorro-antd components
  .@{ant-prefix}-transfer-operation {
    .@{ant-prefix}-btn + .@{ant-prefix}-btn {
      margin-left: initial;
    }
  }
}

.preserve-white-spaces-mixin(@preserve-white-spaces-enabled);