An object providing access to a LongString.
This might be implemented to read directly from connection
socket, depending on the size of the content to be read -
long strings may contain up to 4Gb of content.
Get the content as a byte array. This need not be a copy. Updates to the
returned array may change the value of the string.
Repeated calls to this function may return the same array.
This function will fail if this string's length is greater than Integer.MAX_VALUE,
throwing an IllegalStateException.
the array of bytes containing the content of the LongString