ant-design/components/style/mixins/index.less

// Mixins
// --------------------------------------------------
@import 'size';
@import 'compatibility';
@import 'clearfix';
@import 'iconfont';
@import 'typography';
@import 'customize';
@import 'box';
@import 'modal-mask';

// Note: These mixins require theme variables. Let's move to theme file instead:
// @import 'motion';
// @import 'reset';
// @import 'operation-unit';