private void writeSelf(
String origTarget, GeneBranch currentParent, GeneBranch down, Writer writer1, Writer writer2)
throws IOException {
if (!down.isSelected()) return;
String edgeTag;
if (down.isLeaf() || travExp.getUpstream(down.gene).contains(currentParent)) {
edgeTag = SIFEnum.CONTROLS_EXPRESSION_OF.getTag();
} else edgeTag = SIFEnum.CONTROLS_STATE_CHANGE_OF.getTag();
writer1.write(currentParent.gene + "\t" + edgeTag + "\t" + down.gene + "\n");
writeWeights(origTarget, currentParent, down, edgeTag, writer2);
writeBranches(origTarget, down, writer1, writer2);
}
