Create a fp_cell object that describes cell formatting properties.
fp_cell(
  border = fp_border(width = 0),
  border.bottom,
  border.left,
  border.top,
  border.right,
  vertical.align = "center",
  margin = 0,
  margin.bottom,
  margin.top,
  margin.left,
  margin.right,
  background.color = "transparent",
  text.direction = "lrtb"
)# S3 method for fp_cell
format(x, type = "wml", ...)
# S3 method for fp_cell
print(x, ...)
# S3 method for fp_cell
update(
  object,
  border,
  border.bottom,
  border.left,
  border.top,
  border.right,
  vertical.align,
  margin = 0,
  margin.bottom,
  margin.top,
  margin.left,
  margin.right,
  background.color,
  text.direction,
  ...
)
shortcut for all borders.
fp_border for borders.
cell content vertical alignment - a single character value, expected value is one of "center" or "top" or "bottom"
shortcut for all margins.
cell margins - 0 or positive integer value.
cell background color - a single character value specifying a valid color (e.g. "#000000" or "black").
cell text rotation - a single character value, expected value is one of "lrtb", "tbrl", "btlr".
fp_cell object
output type - one of 'wml', 'pml', 'html'.
further arguments - not used
Other functions for defining formatting properties: 
fp_border(),
fp_par(),
fp_text()
# NOT RUN {
obj <- fp_cell(margin = 1)
update( obj, margin.bottom = 5 )
# }
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