private void CreateOrUpdateHeader(IPage page, PageNumber previousSectionLastPage, PageMargin previousSectionMargin)
{
if (!_headers.ContainsKey(page.PageNumber))
{
var header = previousSectionLastPage == page.PageNumber
? HeaderFactory.CreateInheritedHeader(previousSectionMargin)
: _properties.HeaderFooterConfiguration
.FindHeader(page.PageNumber)
.CreateHeader(_properties.Margin, _imageAccessor, _styleFactory);
_headers.Add(page.PageNumber, header);
}
_headers[page.PageNumber].Prepare(page);
}