gResolverLookupByAddress
Synchronously reverse-resolves address to determine its
associated hostname.
gResolverLookupByAddress(object, address, cancellable = NULL, 
    .errwarn = TRUE) | 
|
 | 
 the address to reverse-resolve  | 
 | 
 a   | 
.errwarn | 
 Whether to issue a warning on error or fail silently  | 
If the DNS resolution fails, error (if non-NULL) will be set to
a value from GResolverError.
If cancellable is non-NULL, it can be used to cancel the
operation, in which case error (if non-NULL) will be set to
G_IO_ERROR_CANCELLED.
Since 2.22
A list containing the following elements:
retval | 
 [character] a hostname (either ASCII-only, or in ASCII-encoded
form), or   | 
 | 
 return location for a   | 
Derived by RGtkGen from GTK+ documentation
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