RTEditor/src/main/java/com/onegravity/rteditor/utils/io/output/StringBuilderWriter.java
@Override
    public void write(char[] value, int offset, int length) {
        if (value != null) {
            builder.append(value, offset, length);
        }
    }
@Override
    public void write(char[] value, int offset, int length) {
        if (value != null) {
            builder.append(value, offset, length);
        }
    }
Write a portion of a character array to the {@link StringBuilder}.

@param value The value to write
@param offset The index of the first character
@param length The number of characters to write