object::contains

`object::contains`

Return true if the key is found.

bool
contains(
    string_view key) const noexcept;

This function returns true if a key with the specified string is found.

return this->find(key) != this->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.