Write small classes, functions

{t} This enhances readability.
Try to stay below 30 lines of code
(including comments and white space)
per function or method.
For functions with 30 to 70 lines of code,
reviewers can request a split, if beneficial.
Never exceed 70 lines of code per function.

Other scopes such as tests should also be kept small,
but the above hard limits do not apply to them.