Evaluates the configuration root in place. An expression sees the configuration through a view in
which every template that it reaches is evaluated first (once, cached), so keys refer to each other in
any order; a value an expression returns is never evaluated again. Objects marked _ignoreEl (such
as env) are read as they are. Failures, including a circular reference, are ExpressionErrors
naming the key.
Evaluates the configuration
rootin place. An expression sees the configuration through a view in which every template that it reaches is evaluated first (once, cached), so keys refer to each other in any order; a value an expression returns is never evaluated again. Objects marked_ignoreEl(such asenv) are read as they are. Failures, including a circular reference, are ExpressionErrors naming the key.