.add_sanity_check       Adds a sanity check to the list of already
                        performed sanity checks
add_sanity_check        Adds a sanity check to the list of already
                        performed sanity checks
clear_sanity_checks     Removes all tracked sanity checks
get_sanity_checks       Returns all performed sanity checks
h_add_sanity_check      Wrapper for add_sanity_check for internal use
h_collapse_char_vec     Collapse a vector of characters to a string
                        with separators
h_complete_list         Extends a list with an named element if the
                        element does not exist
h_deparsed_sys_call     Simply converts a call into a character
sc_col_elements         Checks that the elements of a column belong to
                        a certain set
sc_cols_bounded         Checks that all elements from the specified
                        columns are in a certain range
sc_cols_bounded_above   Checks that all elements from the given columns
                        are below a certain number
sc_cols_bounded_below   Checks that all elements from the given columns
                        are above a certain number
sc_cols_non_NA          Checks that all elements from the specified
                        columns are not NA
sc_cols_positive        Checks that all elements from the specified
                        columns are positive
sc_cols_unique          Checks that the combination of the specified
                        columns is unique
sc_left_join            Performs various checks after a left-join was
                        performed
