impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/ForEachHandler.java [684:734]:
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        else if (src instanceof Map && value instanceof Map.Entry entry)
        {
            return new MappedValueExpression(ve, entry);
        }
        else if (src instanceof Collection)
        {
            return new IteratedValueExpression(ve, value);
        }
        throw new IllegalStateException("Cannot create VE for: " + src);
    }

    private String getVarName(FaceletContext ctx)
    {
        if (this.var != null)
        {
            return this.var.getValue(ctx);
        }
        return null;
    }

    private String getVarStatusName(FaceletContext ctx)
    {
        if (this.varStatus != null)
        {
            return this.varStatus.getValue(ctx);
        }
        return null;
    }

    private Iterator<?> toIterator(Object src)
    {
        if (src == null)
        {
            return null;
        }
        else if (src instanceof Collection collection)
        {
            return collection.iterator();
        }
        else if (src instanceof Map map)
        {
            return map.entrySet().iterator();
        }
        else if (src.getClass().isArray())
        {
            return new ArrayIterator(src);
        }
        else
        {
            throw new TagAttributeException(this.tag, this.items,
                    "Must evaluate to a Collection, Map, Array, or null.");
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impl/src/main/java/org/apache/myfaces/view/facelets/tag/jstl/core/LegacyForEachHandler.java [345:395]:
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        else if (src instanceof Map && value instanceof Map.Entry entry)
        {
            return new MappedValueExpression(ve, entry);
        }
        else if (src instanceof Collection)
        {
            return new IteratedValueExpression(ve, value);
        }
        throw new IllegalStateException("Cannot create VE for: " + src);
    }

    private String getVarName(FaceletContext ctx)
    {
        if (this.var != null)
        {
            return this.var.getValue(ctx);
        }
        return null;
    }

    private String getVarStatusName(FaceletContext ctx)
    {
        if (this.varStatus != null)
        {
            return this.varStatus.getValue(ctx);
        }
        return null;
    }

    private Iterator<?> toIterator(Object src)
    {
        if (src == null)
        {
            return null;
        }
        else if (src instanceof Collection collection)
        {
            return collection.iterator();
        }
        else if (src instanceof Map map)
        {
            return map.entrySet().iterator();
        }
        else if (src.getClass().isArray())
        {
            return new ArrayIterator(src);
        }
        else
        {
            throw new TagAttributeException(this.tag, this.items,
                    "Must evaluate to a Collection, Map, Array, or null.");
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