Class creation ({})
To create a class, you can use the {:<key_1> <value_1>, :<key_2> <value_2>, ...} syntax, where the keys are the name of the fields and the values can be dynamic.
To access a class field, you can use the :: operator. i.e. $class::email will access a key name :email in a value named $class.
Example:
# Simple class example
findit -d 'File: {:name name, :size size}'
# More complex: files with same first and last line
findit -w 'WITH $lines AS lines(), $fl AS {:first $lines.first(), :last $lines.last()} DO $fl::first = $fl::last END'