Keyword.drop

You're seeing just the function drop, go back to Keyword module for more information.

drop(keywords, keys)

drop(t(), [key()]) :: t()

Drops the given keys from the keyword list.

Duplicated keys are preserved in the new keyword list.

iex> Keyword.drop([a: 1, b: 2, c: 3], [:b, :d])
[a: 1, c: 3]
iex> Keyword.drop([a: 1, b: 2, b: 3, c: 3, a: 5], [:b, :d])
[a: 1, c: 3, a: 5]