concatWith concatWith(source: Binary, with: Binary): Binary Concatenates the content of two binaries. Introduced in DataWeave version 2.5.0. Parameters Name Type Description source Binary The source binary content. with Binary The binary to append. Example This example concats two binaries into one binary. Source %dw 2.0 import * from dw::core::Binaries output application/dw --- "CAFE" as Binary {base: "16"} concatWith "ABCD" as Binary {base: "16"} Output "yv6rzQ==" as Binary {base: "64"} concatWith(source: Binary, with: Null): Binary Helper function that enables concatWith to work with a null value. concatWith(source: Null, with: Binary): Binary Helper function that enables concatWith to work with a null value.