a valid #GParamSpec
souce #GValue
destination #GValue of correct type for @pspec
%TRUE requires @dest_value to conform to @pspec without modifications
%TRUE if transformation and validation were successful, %FALSE otherwise and @dest_value is left untouched.
Transforms @src_value into @dest_value if possible, and then validates @dest_value, in order for it to conform to @pspec. If @strict_validation is %TRUE this function will only succeed if the transformed @dest_value complied to @pspec without modifications.
See also g_value_type_transformable(), g_value_transform() and g_param_value_validate().