writeToJson method
Returns a JSON string that encodes this message.
Each message (top level or nested) is represented as an object delimited by curly braces. Within a message, elements are indexed by tag number (surrounded by quotes). Repeated elements are represented as arrays.
Boolean values, strings, and floating-point values are represented as literals. Values with a 32-bit integer datatype are represented as integer literals; values with a 64-bit integer datatype (regardless of their actual runtime value) are represented as strings. Enumerated values are represented as their integer value.
For the proto3 JSON format use: toProto3Json.
Unknown field data, data for which there is no metadata for the associated field, will only be included if this message was deserialized from the same wire format.
Implementation
String writeToJson() => jsonEncode(writeToJsonMap());