public Builder customHeader(String name, String value) {
            customHeaders.put(name, value);
            return this;
        }
Put a new custom header to the map of custom header names to custom header values. <p>
NOTE: Custom header values set via this method will overwrite any conflicting values
coming from the request parameters.

@param name  The name of the header to add
@param value The value of the header to add
@return This object for method chaining.
aws-java-sdk-opensdk/src/main/java/com/amazonaws/opensdk/SdkRequestConfig.java