Loads the given private key identified by id and data.
An EngineError is raised of the OpenSSL::PKey is unavailable.
Specification attributes that must be non-nil
Expire memoized instance variables that can incorrectly generate, replace or miss files due changes in certain attributes used to compute them.
Check that a method is callable via dRuby.
obj is the object we want to invoke the method on. msg_id is the method name, as a Symbol.
If the method is an insecure method (see insecure_method?) a SecurityError is thrown. If the method is private or undefined, a NameError is thrown.
Returns the inverse of the eigenvector matrix V