@Override
    public SecurityMetadataSource obtainSecurityMetadataSource() {
        return this.securityMetadataSource;
    }
Creates a new AuthorizationCheckingServerInterceptor with the given {@link AccessDecisionManager} and
{@link GrpcSecurityMetadataSource}.

@param accessDecisionManager The access decision manager to use.
@param securityMetadataSource The security metadata source to use.
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/security/interceptors/AuthorizationCheckingServerInterceptor.java