code: function getChangeSetResponseIndex(sMimeTypeHeaders) {
  		var sContentID = getHeaderValue(sMimeTypeHeaders, "content-id"),
  			iResponseIndex;
  
  		if (!sContentID) {
  			throw new Error("Content-ID MIME header missing for the change set response.");
  		}
  
  		iResponseIndex = parseInt(sContentID);
  		if (isNaN(iResponseIndex)) {
  			throw new Error("Invalid Content-ID value in change set response.");
  		}
  		return iResponseIndex;
  	}
docs: Returns index of the response inside of a change set by parsing the Content-ID header value
  available as a part of the specified change set response <code>sMimeTypeHeaders</code>.
  The function expects Content-ID header value to be specified in <code>i.j</code> notation,
  where <code>i</code> represents the index of the response inside of the change set.
  
  @param {string} sMimeTypeHeaders
  Section of MIME part representing MIME HTTP headers of the change set response
  @returns {number} Zero-based index of the response inside of the change set
  @throws {Error} If there is no Content-ID header in the specified
  <code>sMimeTypeHeaders</code> or the available Content-ID header value is not a number.