}
);
if ( defined @{$mappings}[0] && grep /match-heading/, @{@{$mappings}[0]} ){
if ( @{$mappings} && grep { $_->[0] eq 'match-heading'} @{$mappings} ){
# Used by the authority linker the match-heading field requires a specific syntax
# that is specified in C4/Heading
my $heading = C4::Heading->new_from_field( $field, undef, 1 ); #new auth heading
-