// the returned position is the end position of the last enclosed
// expression.
// Thus, EndPos should not be used for exact demarcation of the
// end of a node in the source; it is mostly useful to determine
// scope ranges where there is some leeway.
func EndPos(n Node) Pos {
	for m := n; ; {
		switch n := m.(type) {
		case nil:
			panic("nil node")

		// packages
		case *File:

                throw IllegalArgumentException("Could not locate the generated diagram in $markdownFile")
            }
            val endPos = content.subList(markerPos, content.size).indexOfFirst { it.contains(endDiagram) && !it.contains(startDiagram) }
            if (endPos < 0) {
                throw IllegalArgumentException("Could not locate the end of the generated diagram in $markdownFile")
            }