check if the token is function e.g. `` sin '' concode_field_sep String OPERATORS concode_elem_sep String IMAGINARY concode_elem_sep String[] FUNCTIONS concode_elem_sep Stack<String> stackOperations concode_elem_sep NumberFormat numberFormat concode_elem_sep Queue<String> outputQueueRPN concode_elem_sep String SEPARATOR concode_elem_sep String[] IGNORABLES concode_elem_sep ComplexFormat complexFormat concode_elem_sep Stack<String> stackRPN concode_elem_sep String VARIABLE concode_field_sep Collection<String> getStackRPN concode_elem_sep Collection<String> getOutputQueueRPN concode_elem_sep byte getPrecedence concode_elem_sep void setPrecision concode_elem_sep String format concode_elem_sep void parse concode_elem_sep int getPrecision concode_elem_sep boolean isOperator concode_elem_sep boolean isIgnorable concode_elem_sep boolean isNumber concode_elem_sep boolean isCloseBracket concode_elem_sep boolean isSeparator concode_elem_sep boolean isOpenBracket concode_elem_sep boolean isAlphaNumeric
boolean function ( String arg0 ) { for ( String loc0 : FUNCTIONS ) { if ( loc0 . equals ( arg0 ) ) { return true ; } } return false ; }