public  void add(Serializable key,
    Object value)
Store the specified
value in a List that is internal to the
StateHelper.

It's important to note for delta
tracking that any modifications to the internal List
be made through this method or StateHelper#remove(java.io.Serializable, Object) .

 public Object eval(Serializable key)
Attempts to find a value associated
with the specified key, using the value expression collection
from the component if no such value is found.

 public Object eval(Serializable key,
    Object defaultValue)
Performs the same logic as #eval(java.io.Serializable)  } but if no value is found, this
will return the specified defaultValue

 public Object get(Serializable key)
Return the value currently
associated with the specified key if any.

 public Object put(Serializable key,
    Object value)
Return the previously stored value
and store the specified key/value pair.  This is intended to
store data that would otherwise reside in an instance variable on
the component.

 public Object put(Serializable key,
    String mapKey,
    Object value)
Store the specified
mapKey/value in a Map that
is internal to the helper, and return the previously stored
value.  The Map will then be associated with
key.



It's important to note for delta tracking that any
modifications to the internal Map be made through
this method or StateHelper#remove(java.io.Serializable,
Object) .

 public Object remove(Serializable key)
Remove the key/value pair from the
helper, returning the value previously stored under this key.

 public Object remove(Serializable key,
    Object valueOrKey)
Remove a value from the inner data
structure.  Look in the inner data structure for the value at the
given key.  If the value is a Map,
remove and return the value under the key given by the
valueOrKey argument.  If the value is a
Collection, simply remove the value given by
the argument valueOrKey and return null.