Name
  annot:SetCMYKColor -- set CMYK color
Synopsis

      status = annot:SetCMYKColor(cmyk)

Function
  This method is currently undocumented in libHaru. Complain to the libHaru authors.

  The `cmyk` parameter must be a table with the following fields initialized:

  `C`
    Cyan level of color.
  `Y`
    Yellow level of color.
  `M`
    Magenta level of color.
  `K`
    Black level of color.

  All values must be between 0 and 1.

  Returns `#HPDF_OK` on success. Otherwise, returns an error code and the error handler is invoked.

Inputs
  cmyk
    CMYK color
Results
  status
    status code

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