@ModuleOption("a filter expression (Ant style) to accept only files that match the pattern")
	public void setPattern(String pattern) {
		this.pattern = pattern;
	}
Holds module options metadata about the {@code file} source.

@author Eric Bottard
@author Gary Russell
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/modules/metadata/FileSourceOptionsMetadata.java