Modern construct in a 1.0 stylesheet

A stylesheet whose version in force is below 2.0 promises to run on an XSLT 1.0 processor, which rejects the instructions XSLT 2.0 added. Rewrite the construct with its 1.0 equivalent (a Muenchian key for xsl:for-each-group, a named template for xsl:sequence), or raise the version to 2.0.

Incorrect:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
  <xsl:template match="/objects">
    <xsl:for-each-group select="*" group-by="@key">
      <xsl:sequence select="current-group()"/>
    </xsl:for-each-group>
  </xsl:template>
</xsl:stylesheet>

Correct:

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
  <xsl:template match="/objects">
    <xsl:for-each-group select="*" group-by="@key">
      <xsl:sequence select="current-group()"/>
    </xsl:for-each-group>
  </xsl:template>
</xsl:stylesheet>

The check covers xsl:for-each-group, xsl:sequence, xsl:analyze-string, xsl:next-match, xsl:perform-sort, xsl:namespace, xsl:character-map, xsl:result-document, xsl:import-schema, and an as attribute on any XSLT element but xsl:function.