public Builder inlineInputSuffix(String inlineInputSuffix) {
            this.inlineInputSuffix = inlineInputSuffix;
            return this;
        }
Defines what suffixes are checked on operation input shapes to determine whether
inline syntax should be used.

<p>This will also set the "operationInputSuffix" control statement.

@param inlineInputSuffix The suffix to use for inline operation input.
@return Returns the builder.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/SmithyIdlModelSerializer.java