This annotation is used on a formal parameter to indicate that the parameter may be returned, but
it is not otherwise leaked. (A parameter is leaked if it is stored in a field where it could be
accessed later, and in that case this annotation would not apply.)
For example, the receiver parameter of StringBuffer#append(String s) is annotated as
@LeakedToResult, because the method returns the updated receiver.
This annotation is currently trusted, not checked.