QT_PROPERTY_DEFAULT_BINDING_LOCATION

Undocumented in source but is binding to C++. You might be able to learn more by searching the web for its name.
extern (C++)
static if(!defined!"QT_PROPERTY_COLLECT_BINDING_LOCATION")
enum QT_PROPERTY_DEFAULT_BINDING_LOCATION = q{QPropertyBindingSourceLocation(current())};

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