pub fn len(&self) -> u64 {
        let keys_len = self.keys.len();
        let values_len = self.values.len();
        if keys_len != values_len {
            env::panic(ERR_INCONSISTENT_STATE)
        } else {
            keys_len
        }
    }
/// Returns the number of elements in the map, also referred to as its size.
Returns the number of elements in the map, also referred to as its size.
Returns the number of elements in the map also referred to as its size .
pub fn len(&self) -> u64 {
        let keys_len = self.keys.len();
        let values_len = self.values.len();
        if keys_len != values_len {
            env::panic(ERR_INCONSISTENT_STATE)
        } else {
            keys_len
        }
    }
pub fn len ( & self ) -> u64 { let keys_len = self . keys . len ( ) ; let values_len = self . values . len ( ) ; if keys_len != values_len { env :: panic ( ERR_INCONSISTENT_STATE ) } else { keys_len } }
Returns the number of elements in the map, also referred to as its size.
Returns the number of elements in the map also referred to as its size .
&self