Verify the Java caller.
verify-java-caller name => result
verify-java-caller verifies the Java caller, which means looking up the corresponding Java methods and setting up the caller for name.
name must be a caller name defined by default-constructor-arguments (but not any of the other definers or setup-java-caller). If it is not, an error is signaled. Note that the importing interface defines the caller using default-constructor-arguments and that define-java-callers also expands to default-constructor-arguments, so
verify-java-caller can be used on such caller (but not on constructors or field accessors).
verify-java-caller looks up the Java class and method of the caller (unless they are already cached), and caches the information (so future calls to name or verification can use it).
t if successful,
verify-java-caller requires running Java.
In most cases using verify-java-callers to verify all the callers is more convenient.
Verification is useful to guard against typing mistakes when you typed the default-constructor-arguments explicitly because that does not do any lookup until runtime, or when you are not sure that the class definition has not changed between the time you imported the definition and the time it is used.
LispWorks User Guide and Reference Manual - 13 Feb 2015