public String getSourceIdentifier() {
        return this.sourceIdentifier;
    }
<p>
An identifier for this project source. The identifier can only contain alphanumeric characters and underscores,
and must be less than 128 characters in length.
</p>

@return An identifier for this project source. The identifier can only contain alphanumeric characters and
        underscores, and must be less than 128 characters in length.
aws-java-sdk-codebuild/src/main/java/com/amazonaws/services/codebuild/model/ProjectSource.java