@Override
    void parseLong(CacheBuilderSpec spec, long value) {
      checkArgument(
          spec.maximumSize == null, "maximum size was already set to %s", spec.maximumSize);
      checkArgument(
          spec.maximumWeight == null, "maximum weight was already set to %s", spec.maximumWeight);
      spec.maximumSize = value;
    }
  }

  /** Parse maximumWeight */

    @Override
    void parseLong(CacheBuilderSpec spec, long value) {
      checkArgument(
          spec.maximumSize == null, "maximum size was already set to %s", spec.maximumSize);
      checkArgument(
          spec.maximumWeight == null, "maximum weight was already set to %s", spec.maximumWeight);
      spec.maximumSize = value;
    }
  }

  /** Parse maximumWeight */

<!--{
	"Title": "The Go Programming Language Specification",
	"Subtitle": "Language version go1.27 (April 1, 2026)",
	"Path": "/ref/spec"
}-->

<h2 id="Introduction">Introduction</h2>

<p>
This is the reference manual for the Go programming language.
For more information and other documents, see <a href="/">go.dev</a>.
</p>

<p>
Go is a general-purpose language designed with systems programming