Function nm_utils_parse_variant_attributes 

pub unsafe extern "C" fn nm_utils_parse_variant_attributes(
    string: *const c_char,
    attr_separator: c_char,
    key_value_separator: c_char,
    ignore_unknown: gboolean,
    spec: *const *const NMVariantAttributeSpec,
    error: *mut *mut GError,
) -> *mut GHashTable

Available on crate feature v1_8 only.