Extracts cells elements
get_cell_element(cells, tag = "td | th", elFun, rm_escape, rm_whitespace)
a list of cell nodes
a character vector that provides information used in the XPath expression to extract the correct elements
a function that is executed over the header/body cell nodes
a character vector that, if specified, is used to replace escape sequences in header and body cells (default value ' ')
logical, should leading/trailing whitespace be removed from cell values ( default value TRUE)?
the body element