Unicode.Property.ids_trinary_operator-question-mark
You're seeing just the function
ids_trinary_operator-question-mark, go back to Unicode.Property module for more information.
Returns a boolean indicating if the
codepoint or string has the property
:ids_trinary_operator.
For string parameters, all codepoints in
the string must have the :ids_trinary_operator
property in order for the result to be true.