object::contains

`object::contains`

Return true if the key is found.

bool
contains(
    string_view key) const noexcept;

Checks if there is an element with key equal to key.

return find(key) != end();

Constant on average, worst case linear in size().

No-throw guarantee.

Name Description

Name	Description
`key`	The key of the element to find.

key

The key of the element to find.