Function SCIPvarGetBdchgInfo 

pub unsafe extern "C" fn SCIPvarGetBdchgInfo(
    var: *mut SCIP_VAR,
    boundtype: SCIP_BOUNDTYPE,
    bdchgidx: *mut SCIP_BDCHGIDX,
    after: c_uint,
) -> *mut SCIP_BDCHGINFO

returns the bound change information for the last lower or upper bound change on given active problem variable before or after the bound change with the given index was applied; returns NULL, if no change to the lower/upper bound was applied up to this point of time