public ManualGrpcSecurityMetadataSource set(final MethodDescriptor<?, ?> method, final AccessPredicate predicate) {
        requireNonNull(method, "method");
        this.accessMap.put(method, wrap(predicate));
        return this;
    }
Set the given access predicate for the given method. This will replace previously set predicates.

@param method The method to protect with a custom check.
@param predicate The predicate used to check the {@link Authentication}.
@return This instance for chaining.
@see #setDefault(AccessPredicate)
grpc-server-spring-boot-starter/src/main/java/net/devh/boot/grpc/server/security/check/ManualGrpcSecurityMetadataSource.java