public String asString() {
        Charset charset = this.type.getCharset();
        if (charset == null) {
            charset = StandardCharsets.ISO_8859_1;
        }
        return asString(charset);
    }
This class represents arbitrary content of a specific type that can be consumed
multiple times and requires no explicit deallocation used by the fluent facade.

@since 4.2
httpclient5-fluent/src/main/java/org/apache/hc/client5/http/fluent/Content.java