object::contains

Return true if the key is found.

bool
contains(
    string_view key) const;

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

return this->[link json.ref.boost__json__object.find `find`](key) != this->[link json.ref.boost__json__object.end `end`]();

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

No-throw guarantee.

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