@ModuleOption("a SpEL expresssion location of known hosts file; required if 'allowUnknownKeys' is false; "
			+ "examples: systemProperties[\"user.home\"]+\"/.ssh/known_hosts\", \"/foo/bar/known_hosts\"")
	public void setKnownHostsExpression(String knownHostsExpression) {
		this.knownHostsExpression = knownHostsExpression;
	}
Module options for SFTP source module.

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