pub fn exists_child_storage(storage_key: &[u8], key: &[u8]) -> bool {
	ext::with(|ext| {
		let storage_key = child_storage_key_or_panic(storage_key);
		ext.exists_child_storage(storage_key, 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_child_storage(storage_key: &[u8], key: &[u8]) -> bool {
	ext::with(|ext| {
		let storage_key = child_storage_key_or_panic(storage_key);
		ext.exists_child_storage(storage_key, key)
	}).unwrap_or(false)
}
pub fn exists_child_storage ( storage_key : & [ u8 ] , key : & [ u8 ] ) -> bool { ext :: with ( | ext | { let storage_key = child_storage_key_or_panic ( storage_key ) ; ext . exists_child_storage ( storage_key , key ) } ) . unwrap_or ( false ) }
Check whether a given `key` exists in storage.
Check whether a given ` key ` exists in storage .
storage_key
&[u8]
key
&[u8]
storage_key
&[u8]
key
&[u8]