Creates a writer that writes content starting at offset "start"
in the document. <code>start</code> and <code>length</code> can be set to specify partial lines.
@param start start offset of content to write, 0 based from beginning of document
@param length length of content to write
Creates a writer that writes content starting at offset "start" in the document. <code>start</code> and <code>length</code> can be set to specify partial lines.
@param start start offset of content to write, 0 based from beginning of document @param length length of content to write