Gets every operator other than Tf, Tm and the g, rg and k fill colour operators, in order,
each with its operands as written and separated by one space; empty when there are none. Operators that were ignored (see
Problems) are left out.
public ReadOnlyMemory<byte> OtherOperators { get; }
ISO 32000-2 §12.7.4.3: graphics state or text state operators that establish parameters for the variable text.