Function overlay

overlay(a0: Bit<0 | 1>, a1: Bit<0 | 1>, a2: Int4<0 | 1>): Bit<0 | 1>

overlay(
    a0: Bit<0 | 1>,
    a1: Bit<0 | 1>,
    a2: Int4<0 | 1>,
    a3: Int4<0 | 1>,
): Bit<0 | 1>

overlay(a0: Bytea<0 | 1>, a1: Bytea<0 | 1>, a2: Int4<0 | 1>): Bytea<0 | 1>

overlay(
    a0: Bytea<0 | 1>,
    a1: Bytea<0 | 1>,
    a2: Int4<0 | 1>,
    a3: Int4<0 | 1>,
): Bytea<0 | 1>

overlay(a0: Text<0 | 1>, a1: Text<0 | 1>, a2: Int4<0 | 1>): Text<0 | 1>

overlay(
    a0: Text<0 | 1>,
    a1: Text<0 | 1>,
    a2: Int4<0 | 1>,
    a3: Int4<0 | 1>,
): Text<0 | 1>