Decodes this buffer's readable bytes into a string with the specified
character set name. This method is identical to
{@code buf.toString(buf.readerIndex(), buf.readableBytes(), charsetName)}.
This method does not modify {@code readerIndex} or {@code writerIndex} of
this buffer.
@throws UnsupportedCharsetException
if the specified character set name is not supported by the
current VM
Decodes this buffer's readable bytes into a string with the specified character set name. This method is identical to {@code buf.toString(buf.readerIndex(), buf.readableBytes(), charsetName)}. This method does not modify {@code readerIndex} or {@code writerIndex} of this buffer.
@throws UnsupportedCharsetException if the specified character set name is not supported by the current VM