[xsl] Navigating <xsl:for-each-group> groups

["Rick Quatro rick@xxxxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>]

As I am processing a for-each-group, I want to check some of the elements
within the group that are before or after the current node. I can use
preceding-sibling and following-sibling axes, but it doesn't seem like these
are restricted to the current-group. Is there a good way to query what is
before or after the current node of a group, while insuring that the query
stays within the group? Thanks. -Rick

XML:

<?xml version="1.0" encoding="UTF-8"?>
<root>
    <first>First</first>
    <second>Second</second>
    <one>Number one</one>
    <two>Number two</two>
    <three>Number three</three>
    <four>Number four</four>
    <five>Number five</five>
    <one>Number one2</one>
    <two>Number two2</two>
    <four>Number four2</four>
    <five>Number five2</five>
</root>

XSLT:

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
    xmlns:xs="http://www.w3.org/2001/XMLSchema";
    exclude-result-prefixes="xs"
    version="2.0">
    
    <xsl:output indent="yes"/>
    
    <xsl:template match="/">
        <xsl:apply-templates select="root"/>
    </xsl:template>
    
    <xsl:template match="root">
        <xsl:for-each-group select="*" group-starting-with="one">
            <xsl:call-template name="precGroup">
                <xsl:with-param name="precGroup" select="current-group()"/>
            </xsl:call-template>
        </xsl:for-each-group>
    </xsl:template>
    
    <xsl:template name="precGroup">
        <xsl:param name="precGroup"/>
        <xsl:for-each select="$precGroup">
            <xsl:message select="."/>
        </xsl:for-each>
    </xsl:template>
    
    <xsl:template match="*">
        <xsl:copy-of select="."/>
    </xsl:template>
</xsl:stylesheet>