FPDFAnnot_HasKey method
Experimental API. Check if |annot|'s dictionary has |key| as a key.
annot - handle to an annotation. key - the key to look for, encoded in UTF-8.
Returns true if |key| exists.
Implementation
int FPDFAnnot_HasKey(FPDF_ANNOTATION annot, FPDF_BYTESTRING key) {
return _FPDFAnnot_HasKey(annot, key);
}