@Override
        public boolean onComplex(FieldValue fv) {
            return false;
        }
RemoveFieldPathUpdate is used to remove fields or portions of fields based on the field path supplied and optionally
a where clause.

If document type "testdoc" has a field "ivec" which is an array of integers, then the field path and where clause
to remove all array elements having the value 5 is "ivec[$x]" and "testdoc.ivec[$x] == 5".

If document type "testdoc" has a field "svec" which is an array of struct containing an integer field "ival" then
"svec[$x]" and "testdoc.svec[$x].ival == 5" can be used to remove all array elements where ival is 5.

@author <a href="mailto:thomasg@yahoo-inc.com">Thomas Gundersen</a>
document/src/main/java/com/yahoo/document/fieldpathupdate/RemoveFieldPathUpdate.java