}
xml.append("</tileTypes>\n");
xml.append("<prerequisites>\n");
Iterator<TileBuildablePrerequisite> iterator = tileImprovementType.getPrerequisitesIterator();
while (iterator.hasNext()) {
TileBuildablePrerequisite tileBuildablePrerequisite = iterator.next();
if (tileBuildablePrerequisite instanceof NoVegetationPrerequisite) {
xml.append("<NoVegetation/>\n");
} else if (tileBuildablePrerequisite instanceof NoTileImprovementPrerequisite) {
NoTileImprovementPrerequisite noTileImprovementPrerequisite = (NoTileImprovementPrerequisite) tileBuildablePrerequisite;
xml.append("<NoTileImprovement>\n");