Sets @key in @settings to @value.
A convenience variant of g_settings_set() for doubles.
It is a programmer error to give a @key that isn't specified as having a 'double' type in the schema for @settings.
the name of the key to set
the value to set it to
%TRUE if setting the key succeeded, %FALSE if the key was not writable
2.26
See Implementation
Sets @key in @settings to @value.
A convenience variant of g_settings_set() for doubles.
It is a programmer error to give a @key that isn't specified as having a 'double' type in the schema for @settings.