*       maintains the original model version (4.2.0) instead of downgrading to 4.0.0 for Maven 3 compatibility.
 *       This allows modern features like mixins to be preserved in the consumer POM.</li>
 * </ul>
 * <p>
 * <b>Mixin Handling</b>: Mixins are only supported in model version 4.2.0 or later. If a POM contains mixins:
 * <ul>
 *   <li>Setting {@code preserve.model.version=true} preserves them in the consumer POM with model version 4.2.0</li>

$fluid-val, $val);\n      }\n    }\n  }\n}\n\n// Shorthand helper mixins\n@mixin font-size($value) {\n  @include rfs($value);\n}\n\n@mixin padding($value) {\n  @include rfs($value, padding);\n}\n\n@mixin padding-top($value) {\n  @include rfs($value, padding-top);\n}\n\n@mixin padding-right($value) {\n  @include rfs($value, padding-right);\n}\n\n@mixin padding-bottom($value) {\n  @include rfs($value, padding-bottom);\n}\n\n@mixin padding-left($value) {\n  @include rfs($value, padding-left);\n}\n\n@mixin...

        <field xdoc.separator="blank">
          <name>mixins</name>
          <version>4.2.0+</version>
          <description>Mixins...</description>
          <association>
            <type>Mixin</type>
            <multiplicity>*</multiplicity>
          </association>
        </field>

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