Creates a Separation colour space with a tint transform of the caller's, or returns the one this document already has for the same values.
public PdfSeparationColorSpace CreateSeparationColorSpace(string colorant, PdfColorSpace alternate, PdfFunction tintTransform)
The colourant's name; All or None for the special colourants.
The alternate space: a device or CIE-based space of this document, not a special space.
A function of this document from one tint to the alternate's components (see CreateExponentialFunction(ReadOnlySpan<Double>, ReadOnlySpan<Double>, Double) and CreatePostScriptFunction(ReadOnlySpan<Double>, ReadOnlySpan<Double>, String)).
ISO 32000-2 §8.6.6.4 (PDF 1.2). Records PDF 1.2 and the function's version (§7.10). A mutation.