Unicode.Property.grapheme_extend-question-mark

You're seeing just the function grapheme_extend-question-mark, go back to Unicode.Property module for more information.
Link to this function

grapheme_extend?(codepoint)

View Source

Returns a boolean indicating if the codepoint or string has the property :grapheme_extend.

For string parameters, all codepoints in the string must have the :grapheme_extend property in order for the result to be true.