# Determine if note or args is a rest

``

    rest?  note_or_args (number_symbol_or_map)

Given a note or an args map, returns true if it represents a rest and false if otherwise

Introduced in v2.1

## Examples

# Example 1
``
    puts rest? nil
| ``
    # true
# Example 2
``
    puts rest? :r
| ``
    # true
# Example 3
``
    puts rest? :rest
| ``
    # true
# Example 4
``
    puts rest? 60
| ``
    # false
# Example 5
``
    puts rest? {}
| ``
    # false
# Example 6
``
    puts rest? {note: :rest}
| ``
    # true
# Example 7
``
    puts rest? {note: nil}
| ``
    # true
# Example 8
``
    puts rest? {note: 50}
| ``
    # false