in core-it-support/core-it-plugins/maven-it-plugin-expression/src/main/java/org/apache/maven/plugin/coreit/PropertyUtil.java [166:174]
static String getPropertyName(String methodName) {
String propertyName = methodName;
if (methodName.startsWith("get") && methodName.length() > 3) {
propertyName = Character.toLowerCase(methodName.charAt(3)) + methodName.substring(4);
} else if (methodName.startsWith("is") && methodName.length() > 2) {
propertyName = Character.toLowerCase(methodName.charAt(2)) + methodName.substring(3);
}
return propertyName;
}