Function pango_attr_break 

pub unsafe extern "C" fn pango_attr_break(
    text: *const c_char,
    length: c_int,
    attr_list: *mut PangoAttrList,
    offset: c_int,
    attrs: *mut PangoLogAttr,
    attrs_len: c_int,
)

Available on crate feature v1_50 only.