pub fn exists_storage(key: &[u8]) -> bool {
	ext::with(|ext|
		ext.exists_storage(key)
	).unwrap_or(false)
}
/// Check whether a given `key` exists in storage.
Check whether a given `key` exists in storage.
Check whether a given ` key ` exists in storage .
pub fn exists_storage(key: &[u8]) -> bool {
	ext::with(|ext|
		ext.exists_storage(key)
	).unwrap_or(false)
}
pub fn exists_storage ( key : & [ u8 ] ) -> bool { ext :: with ( | ext | ext . exists_storage ( key ) ) . unwrap_or ( false ) }
Check whether a given `key` exists in storage.
Check whether a given ` key ` exists in storage .
key
&[u8]
key
&[u8]