chains multiple Searches together and shows the values that
all of the conditions met. note that all of the Node based and
Delegate based classes' initialValue can be changed.
that will also effect the further comparisons and searches.
A search delegate for complicated searches. It is for objects to meet specific
conditions. This class is multiple factor searching, meaning that when not one but many different
conditions individualy qualifies for the result this class handles them.
it has a _TreeSearchNode as start node.
it is for determining _TreeSearchNode to how to handle _TreeSearchNode.inShwon
method. ALL means all of the sub-nodes have to return true for value to be in shown,
ONLY means only one of the sub-nodes returning true is enough, and NONE is non of the sub-nodes