Wraps an object, providing reflective access to the object graph of which the
supplied object is the root. Expressions like 'child.name' will translate into
'rootObject.getChild().getName()' for non-boolean properties, and
'rootObject.getChild().isName()' for boolean properties.
Split the expression into parts, tokenized on the dot ('.') character. Then,
starting at the root object contained in this value source, apply each part
to the object graph below this root, using either 'getXXX()' or 'isXXX()'
accessor types to resolve the value for each successive expression part.
Finally, return the result of the last expression part's resolution.
NOTE: The object-graph nagivation actually takes place via the