This parameter is a 'user_data', for callbacks; many bindings can pass NULL here.
constructor
This symbol is a constructor, not a static method.
E
element-type
Generics and defining elements of containers and arrays.
I
inout
Parameter for input and for returning results. Default is transfer full.
M
method
This is a method
N
nullable
NULL may be passed as the value in, out, in-out; or as a return value.
O
optional
NULL may be passed instead of a pointer to a location.
out
Parameter for returning results. Default is transfer full.
out caller-allocates
Out parameter, where caller must allocate storage.
S
scope async
The callback is valid until first called.
scope call
The callback is valid only during the call to the method.
skip
Exposed in C code, not necessarily available in other languages.
Stable
The intention of a Stable interface is to enable arbitrary third parties to
develop applications to these interfaces, release them, and have confidence that
they will run on all minor releases of the product (after the one in which the
interface was introduced, and within the same major release). Even at a major
release, incompatible changes are expected to be rare, and to have strong
justifications.