@Override
        public SmithyIdlModelSerializer build() {
            return new SmithyIdlModelSerializer(this);
        }
Determines whether inline IO should be coerced for shapes operation input
and output that does not have the {@code @input} or {@code @output} trait,
respectively.

<p>If true, this will determine any shared IO suffixes for each file. Only the
shapes present within each file will impact what that file's suffixes will be.

<p>The suffixes set by {@link #inlineInputSuffix(String)} and {@link #inlineOutputSuffix(String)}
will be the default values.

@param shouldCoerceInlineIo Whether inline IO should be coerced for each file.
@return Returns the builder.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/SmithyIdlModelSerializer.java