^start of line
\s*any whitespace character, repeated any number of times
product the literal text product (case sensitive) \{the literal { (12310 / 1738 / 7B16)
\na line-feed (newline) character (ASCII 10)
\s*any whitespace character, repeated any number of times
.*any character (except for line terminators), repeated any number of times
Negative Lookbehind(?<!id) idthe literal text id (case sensitive) $end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string