/**
* Links two operand tree nodes.
*
* @param parent The parent node.
* @param child The child node that is added to the parent.
*/
public static void link(final COperandTreeNode parent, final COperandTreeNode child) {
Preconditions.checkNotNull(child, "IE00218: Child argument can not be null");
Preconditions.checkNotNull(parent, "IE00217: Parent argument can not be null");
parent.children.add(child);
child.parent = parent;
}
