check is a generic S3 method for classes inheriting
from item. It is a logical method checking if the item is well defined
with respect to a risk (i.e. that all information necessary for valuating
the item is available).
# S3 method for life
check(object, market.risk, life.risk, ...)S3 object of class life.
S3 object of class marketRisk created using the constructor
marketRisk.
S3 object of class lifeRisk, created using the constructor
lifeRisk.
additional arguments.
a logical value, is the life item consistent with the marketRisk and the healthRisk?