\ba Unicode word boundary
getthe literal text get (case sensitive) \s+a Unicode whitespace character, repeated at least once
thethe literal text the (case sensitive) \s+a Unicode whitespace character, repeated at least once
.*?any Unicode character (except for line terminators), repeated any number of times
Positive Lookahead(?=\s*\bget\b|$) 1st Alternative\s*\bget\b \s*a Unicode whitespace character, repeated any number of times
\ba Unicode word boundary
getthe literal text get (case sensitive) \ba Unicode word boundary
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