public com.google.protobuf.ByteString getCpuBytes() {
      java.lang.Object ref = cpu_;
      if (ref instanceof String) {
        com.google.protobuf.ByteString b =
            com.google.protobuf.ByteString.copyFromUtf8((java.lang.String) ref);
        cpu_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }
<pre>
CPU specification.

Examples:
"100m", "0.5", "1", "2", ... correspond to
0.1, half, 1, or 2 cpus.

Leave empty to let the system decide.

Note that this does *not* determine the cpu vender/make,
or its underlying clock speed and specific SIMD features.
It is only the amount time it requires in timeslicing.
</pre>

<code>string cpu = 1;</code>

@return The bytes for cpu.
java-visionai/proto-google-cloud-visionai-v1/src/main/java/com/google/cloud/visionai/v1/ResourceSpecification.java