@Override
    public SampleFamily call(Object arguments) {
        return fn.apply((Number) this.getDelegate(), (SampleFamily) arguments);
    }
Call binary operation, for instances, {@code 100 + server_cpu_seconds}. {@code server_cpu_seconds}'s type
should be {@link SampleFamily}

@param arguments the right-hand side of binary operation, usually a {@link SampleFamily} object.
@return the result of binary operation.
oap-server/analyzer/meter-analyzer/src/main/java/org/apache/skywalking/oap/meter/analyzer/dsl/NumberClosure.java