Function emitMethod

scripts/codegen/go.ts:4127–4227

(lines: string[], receiver: string, name: string, method: RpcMethod, isSession: boolean, resolveType: (name: string) => string, fields: Map<string, Map<string, GoExtractedField>>, unionInfos: Map<string, GoDiscriminatedUnionInfo>, groupExperimental = false, isWrapper = false, groupDeprecated = false)

}

function emitMethod(lines: string[], receiver: string, name: string, method: RpcMethod, isSession: boolean, resolveType: (name: string) => string, fields: Map<string, Map<string, GoExtractedField>>, unionInfos: Map<string, GoDiscriminatedUnionInfo>, groupExperimental = false, isWrapper = false, groupDeprecated = false): void {
    const methodName = toPascalCase(name);
    const resultSchema = getMethodResultSchema(method);
    const nullableInner = resultSchema ? getNullableInner(resultSchema) : undefined;
    const resultType = nullableInner
        ? resolveType(goNullableResultTypeName(method, nullableInner))
        : resolveType(goResultTypeName(method));
    const resultUnion = unionInfos.get(resultType);
    const returnType = resultUnion ? resultType : `*${resultType}`;

    const effectiveParams = getMethodParamsSchema(method);
    const paramProps = effectiveParams?.properties || {};
    const requiredParams = new Set(effectiveParams?.required || []);
    const nonSessionParams = Object.keys(paramProps)
        .filter((k) => k !== "sessionId")
        .sort((left, right) => compareGoFieldNames(toGoFieldName(left), toGoFieldName(right)));
    const hasParams = isSession ? nonSessionParams.length > 0 : hasSchemaPayload(effectiveParams);
    const paramsType = hasParams ? resolveType(goParamsTypeName(method)) : "";
    const hasRequiredNonSessionParams = nonSessionParams.some((name) => requiredParams.has(name));
    const paramsAreOptional = hasParams && !!method.params && !!getNullableInner(method.params) && !hasRequiredNonSessionParams;

    // For wrapper-level methods, access fields through a.common; for service type aliases, use a directly
    const clientRef = isWrapper ? "a.common.client" : "a.client";
    const sessionIDRef = isWrapper ? "a.common.sessionID" : "a.sessionID";

    pushGoRpcMethodComment(
        lines,
        methodName,
        method,
        resultSchema,
        hasParams ? goRpcParamsDescription(method, effectiveParams) : undefined
    );
    if (method.deprecated && !groupDeprecated) {
        pushGoComment(lines, `Deprecated: ${methodName} is deprecated and will be removed in a future version.`);
    }
    if (method.stability === "experimental" && !groupExperimental) {
        pushGoExperimentalMethodComment(lines, methodName);
    }
    if (method.visibility === "internal") {
        pushGoComment(lines, `Internal: ${methodName} is part of the SDK's internal handshake/plumbing; external callers should not use it.`);
    }
    const sig = hasParams
        ? `func (a *${receiver}) ${methodName}(ctx context.Context, params ${paramsAreOptional ? "..." : ""}*${paramsType}) (${returnType}, error)`
        : `func (a *${receiver}) ${methodName}(ctx context.Context) (${returnType}, error)`;

    lines.push(sig + ` {`);
    const paramsRef = paramsAreOptional ? "requestParams" : "params";
    if (paramsAreOptional) {
        lines.push(`\tvar requestParams *${paramsType}`);
        lines.push(`\tif len(params) > 0 {`);
        lines.push(`\t\trequestParams = params[0]`);
        lines.push(`\t}`);
    }

    if (isSession) {
        lines.push(`\treq := map[string]any{"sessionId": ${sessionIDRef}}`);
        if (hasParams) {
            lines.push(`\tif ${paramsRef} != nil {`);