class StringSource implements Source {
    private final String content;

    private final String location;

    private final int hashCode;

    /**
     * Creates a new source backed by the specified string.
     *
     * @param content The String representation, may be empty or {@code null}.
     */
    public StringSource(CharSequence content) {
        this(content, null);
    }

    /**
     * Creates a new source backed by the specified string.
     *
     * @param content The String representation, may be empty or {@code null}.
     * @param location The location to report for this use, may be {@code null}.
     */
    public StringSource(CharSequence content, String location) {
        this.content = (content != null) ? content.toString() : "";
        this.location = (location != null) ? location : "(memory)";
        this.hashCode = this.content.hashCode();
    }

    @Override
    public InputStream getInputStream() throws IOException {
        return new ByteArrayInputStream(content.getBytes(StandardCharsets.UTF_8));
    }

    @Override
    public String getLocation() {
        return location;
    }

    /**
     * Gets the content of this source.
     *
     * @return The underlying character stream, never {@code null}.
     */
    public String getContent() {
        return content;
    }

    @Override
    public String toString() {
        return getLocation();
    }

    @Override
    public int hashCode() {
        return hashCode;
    }

    @Override
    public boolean equals(Object obj) {<FILL_FUNCTION_BODY>}
}

        if (this == obj) {
            return true;
        }

        if (obj == null) {
            return false;
        }

        if (!StringSource.class.equals(obj.getClass())) {
            return false;
        }

        StringSource other = (StringSource) obj;
        return this.content.equals(other.content);
    
<no_super_class>