static MapTypeSignature ofMap(TypeSignature keyTypeSignature, TypeSignature valueTypeSignature) {
        requireNonNull(keyTypeSignature, "keyTypeSignature");
        requireNonNull(valueTypeSignature, "valueTypeSignature");
        return new MapTypeSignature(keyTypeSignature, valueTypeSignature);
    }
Creates a new type signature for the map with the specified key and value type signatures.
This method is a shortcut for:
<pre>{@code
ofMap("map", keyTypeSignature, valueTypeSignature);
}</pre>
core/src/main/java/com/linecorp/armeria/server/docs/TypeSignature.java